Buddhist Practice Association Thesis Writing

Issue 27

On Doubt

Supervisor: Bennie Spirit

Author: Wang Huaigu

29 September 2026

Abstract

Doubt is one of the six fundamental mental afflictions in Buddhism. As the direct antithesis of faith, it obstructs the arising of virtuous qualities, veils practitioners’ wisdomeye, corrupts one’s own virtuous roots and karmic blessings, and damages wholesome interpersonal affinities. Grounded in the sūtras and śāstras of Chineselanguage Mahāyāna Buddhism, this paper explains the definition and causal origins of the affliction of doubt, analyses the characteristics and harms of eight secondary afflictions derived from doubt, and elucidates the spiritual merits attained by transcending doubt. From the Bodhisattvayāna perspective, it further delineates multifaceted practical methods for subduing doubt. It argues that Bodhisattva practitioners ought not only to eradicate their own doubt, but also actively cultivate faith among sentient beings. Through eloquence and skilful means, they liberate all beings fettered by doubt, thereby realising the Bodhisattva practice of benefiting self and others.

Keywords: Doubt; Fundamental Mental Affliction; Secondary Mental Affliction; Faith; Bodhisattva Practice; Selfbenefit and Altruism

Chapter 1 Introduction

The Avataṃsakasūtra states: “Faith is the source of the path, the mother of merits and virtues; it nourishes all wholesome dharmas.” Faith is the gateway to entering the great ocean of the Dharma, and doubt constitutes faith’s greatest obstacle. Within Buddhist spiritual praxis, greed, anger, delusion, conceit, doubt, and wrongviews are classified as fundamental mental afflictions. Among these, doubt is often overlooked by Buddhist practitioners. Many practitioners readily perceive the coarse faults of greed, anger and conceit, yet struggle to observe subtle inner states of scepticism, suspicion and indecision. Doubt is more than mere intellectual questioning; it is a habitual mental affliction permeating faithbased understanding, human interaction, and spiritual cultivation.

Bodhisattva practitioners arouse the vow: “Sentient beings are numberless; I vow to liberate them. Mental afflictions are inexhaustible; I vow to end them.” They must not only eliminate their own affliction of doubt but also feel compassion for all beings bound by doubt. The Upāsakaśīlasūtra observes: “All mental afflictions are my great foes. Why? Because such afflictions can ruin both self and others.” Doubt is one such great foe: it destroys one’s own virtuous roots and dissolves wholesome affinities between self and others. Hence, for Bodhisattva practitioners, it is an essential task to clarify the doctrine of doubt, recognise its dangers, master spiritual approaches for subduing doubt, and compassionately rescue beings mired in doubt. Drawing upon the Chinese Buddhist canon, this paper conducts a systematic investigation into the affliction of doubt.

Chapter 2 The Doctrinal Meaning of the Affliction of Doubt

Commentary on the Treatise on the One Hundred Dharmas of the Consciousnessonly School remarks: “Doubt takes indecision regarding the true principles as its nature; its function is to obstruct undoubting wholesome states. It obstructs wholesome states because virtuous qualities cannot arise when the mind dwells in indecision.”In Yogācāra teaching, doubt consists of a wavering mind concerning the Four Noble Truths, the Three Jewels and other realities. Its very effect is to block wholesome mental states free of doubt; so long as indecision persists, virtue cannot emerge.

In mundane experience, doubt manifests as suspicion, misgiving, halfbelief, and speculative conjecture. Sentient beings frequently conjecture subjectively without factual grounds, analogous to the parable of the man who suspected his neighbour’s son of theft. Doubt may arise without external triggers; given suitable conditions, it grows even fiercer. Doubt originates from ignorance compounded by delusional conceptualisation: one speculates repeatedly and draws premature conclusions before ascertaining facts, thus generating manifold perplexities.

Faith and doubt are like light and darkness: mutually exclusive, they cannot coexist. Where faith abides, doubt vanishes; where doubt prevails, faith cannot take root. Ordinary beings cling to the maxim “seeing is believing”, trusting only sensory experience, and harbour grave scepticism toward invisible karmic causality, the merits of the Three Jewels, and supramundane states. The Sūtra of the Fortytwo Sections warns practitioners: “Do not trust your own mind, for your mind is untrustworthy … Only after attaining Arhatship may you trust your mind.” The discriminative deluded thoughts of ordinary beings cannot be trusted unreservedly; doubt born from subjectivity commonly deviates from factual reality.

Doubt bears four characteristics: obstructiveness, repulsiveness, illusoriness, and corrosiveness. 1. Obstructiveness: Doubt veils the wisdomeye and steers beings toward wrong paths. 2. Repulsiveness: Once doubt arises toward another person or the Three Jewels, one instinctively rejects wholesome teachings and virtuous spiritual companions; wholesome connections dissolve while unwholesome connections gather. 3. Illusoriness: Doubt itself is momentary delusion with no inherent reality. When outer circumstances shift, doubt dissipates. 4. Corrosiveness: Like sulphuric acid, doubt swiftly erodes human bonds and destroys virtuous roots and merits.

In worldly life, doubt brings tangible suffering. A mind long trapped in doubt lives in constant unease, acting with hesitation and irresolution. Groundless suspicion toward family, friends or spiritual mentors consumes wholesome affinities and may end in isolation. Doubt directed at the Three Jewels or virtuous spiritual guides carries even graver consequences: it gradually alienates one from wholesome Dharma and virtuous companions.

Chapter 3  Eight Secondary Afflictions Arising from Doubt and Their Harmful Consequences

As a fundamental affliction, doubt gives rise to eight secondary mental afflictions: lack of faith, mental distraction, lassitude, restlessness, forgetfulness of mindfulness, stinginess, deceit, and incorrect understanding. These are subtle derivative afflictions of doubt. Recognising them enables practitioners to observe their own minds precisely and identify doubt’s manifold inner guises.

(1) Lack of faith

Lack of faith means holding wrongviews and excessive scepticism, refusing to trust true Dharma and remaining mentally perturbed.^[5] Mere questioning may still be resolved through inquiry. Lack of faith emerges when doubt interweaves with conceit: pride together with scepticism prevents humble inquiry and acceptance of genuine teachings. The Lamrim Chenmo offers this metaphor: “In those devoid of faith, no virtuous qualities grow, just as seeds scorched by fire cannot sprout green shoots.” Those without faith are like burnt seeds incapable of yielding virtue. Lack of faith fosters mutual rejection and isolates people both from one another and from the Dharma. In practice, it manifests as partial and fluctuating trust in a spiritual mentor’s instructions, together with rigid attachment to preconceived opinions. Its karmic fruit is distrust from others and difficulty in forming sincere friendships.

(2) Mental distraction

Mental distraction denotes heedless outward fixation and a wandering mind incapable of stillness. Obsessed with gain and loss, the mind chases external objects like scattered sand and cannot concentrate. Distraction links to past karmic tendencies: when one has created karma of rejecting something, the mind grows agitated in its presence. In daily life, distraction appears as uncontrolled rumination in adversity, external blameshifting, and inability to focus in work or spiritual practice. Its harm lies in scattered thinking, undisciplined speech and action, and failure to accomplish tasks.

(3) Lassitude

Lassitude is mental dimness and befuddlement, a state of mental perturbation without clear comprehension of phenomena. It resembles water muddied with sediment, clouding mental clarity. Indulgence in appetite, sleep, sensual desire and amusement plunges one into lassitude, like an old elephant trapped in mire. Persistent lassitude brings physicalmental heaviness and discouragement, leading to failure in study, worldly endeavour and spiritual cultivation.

(4) Restlessness

Restlessness arises from outer stimuli agitating body and mind, rendering one unable to settle upon a single object of awareness. The mind perpetually pursues novel sensations, like a bear snatching corn cobs only to discard each one. One busies oneself all day yet achieves nothing. In practical terms, after minor setbacks one craves external stimulation; encountering difficulty in practice one seeks new surroundings. Projects remain unfinished; one labours in vain and regrets habitual patterns without changing them.

(5) Forgetfulness of mindfulness

Forgetfulness of mindfulness means chasing delusive thoughts and losing right mindfulness, leading to spiritual decline.^[10] One repeatedly forgets wholesome thoughts that ought to be sustained, losing mindfulness of practice and altruistic aspiration. Consequences include perpetual postponement of deeds that benefit self and others, mental wandering, and physicalmental unrest.

(6) Stinginess

Stinginess is avarice: hoarding wealth or Dharmaknowledge, reluctant to give, and mentally tormented by fear of loss. For the stingy, giving feels as painful as cutting flesh from one’s own body. Clinging to possessions and knowledge and refusing to share, one calculates even toward family and ultimately drives others away.

(7) Deceit

Deceit means flattering and feigning compliance to please others, accompanied by inner unease. It consists of circuitous speech and hypocrisy: one speaks insincerely for personal gain. The deceitful live with troubled conscience; once unmasked, they forfeit others’ trust entirely.

(8) Incorrect understanding

Incorrect understanding signifies misapprehending phenomena, turning away from awakening and chasing worldly objects while mistaking the illusory for real. Perverted views and faulty methods cause outcomes contrary to one’s wishes. In daily life, one judges spiritual mentors and circumstances according to selfcentred bias, twisting reality through preconceptions. Misunderstanding at the root evokes perverted karmic fruits and endless sorrow.

Beyond these eight secondary afflictions, doubt often combines with greed, anger, delusion, conceit and envy to form complex mental states, such as faultfinding, outbursts of rage, and negation of others. These composite afflictions generate great suffering; practitioners must remain watchful and avoid being swept away by them.

Chapter 4 Extraordinary Merits of Transcending Doubt

When practitioners cease following doubt and other mental defilements, they attain many exceptional spiritual benefits.

First, the frantic mind subsides; subsiding, it is Bodhi. The Śūraṅgamasūtra states: “If you simply do not follow the discriminations of worldly karmic fruits and sentient beings — when these three continuities are severed, their three causes cease to arise. Then the mad mind within you, like the man who mistook his reflection for his head, will naturally subside. When madness subsides, that is Bodhi.” Doubt belongs to the deluded frantic mind. When one stops chasing delusive imaginings, the confused mind quiets, and inherent awakening manifests.

Second, free from the defilement of doubt, the Dharmaeye becomes clear. The Śūraṅgamasūtra  teaches that by abandoning birthanddeath delusions and transcending the dust of conceptual images and defilements of discriminatory consciousness, “your Dharmaeye shall instantly become clear; why should you not attain supreme enlightenment?” Doubt is such defilement; when defilement is removed, the wisdomeye opens.

Third, through upright purity and freedom from doubt, one attains the irreversible Bodhicitta. The Sūtra of Rain of Dharma records ten qualities through which Bodhisattvas gain irreversible Bodhicitta; one is “being upright and pure, free from doubt”. An upright, undoubting mind renders the aspiration for awakening irreversible.

Fourth, being free of doubt regarding the Dharma brings inherent mental stillness. The Avataṃsakasūtra lists ten qualities granting Bodhisattvas inherent mental stillness, among them “having no doubt concerning the BuddhaDharma and realising the Buddha’s true wisdom directly”.

Fifth, reciting mantras without doubt or remorse can yield the knowerofothers’minds spiritual power. The Śūraṅgamasūtra relates that practitioners who uphold the precepts and recite the Śūraṅgama Mantra free of doubt and remorse may, within this very physical body, realise the ability to know others’ thoughts.

Sixth, harbouring no doubt toward a spiritual mentor’s instructions enables constant association with virtuous companions. Obeying such guidance without doubt or fear ensures future attainment of supreme perfect awakening. Hearing the Dharma with unwavering trust, without doubt or disparagement, generates wisdom of thorough comprehension. Transcending doubt and deepening earnest faith allow one to penetrate the secret meaning of the Tathāgata’s teachings.

A long verse from the Avataṃsakasūtra (Xianshou Chapter) praises the merits of faith: “Faith, undefiled, purifies the mind; it subdues arrogance and is the root of reverence. It is also the foremost treasure of the Dharma treasury, the pure hand that receives all virtuous practices. Through faith one gives without stinginess; through faith one joyfully enters the Dharma. Faith augments wisdom and merit; through faith one surely reaches the Tathāgata’s ground.” Like a wishfulfilling jewel, pure faith born of transcending doubt gives rise to all sublime merits.

Chapter 5  Spiritual Paths for Bodhisattva Practitioners to Subdue Doubt

Having aroused Bodhicitta, Bodhisattva practitioners must eliminate their own doubt and also feel compassion for sentient beings bound by doubt. Sūtraśāstra sources present multiple practical methods for subduing doubt.

(1) Donning the armour of singleminded resolve, free from doubt concerning all dharmas

The Avataṃsakasūtra describes ten kinds of armour worn by Bodhisattvas, including “donning the armour of singleminded resolve, thereby being free from doubt regarding all dharmas”. By establishing the firm aspiration for Buddhahood as if putting on impenetrable armour, resolute vows subdue the host of Māra and end vacillating doubt toward all phenomena.

(2) Contemplating sentient beings’ suffering, arousing great compassion, dedicating wholesome roots

Bodhisattvas observe sentient beings covered by doubt and wrongviews, sinking within the sea of birthanddeath, and thereby arouse great compassion. As the Avataṃsakasūtra relates, Bodhisattvas gaze upon beings of perverted understanding and resolve to dispel their doubt and wrongviews. After contemplating beings’ suffering, they dedicate all their wholesome roots, wishing that all sentient beings transcend doubt and attain liberation. The power of great compassion and meritdedication subdues doubt for self and others.

(3) Arousing the ten undoubting minds and abiding in the Bodhiaspiration

The Avataṃsakasūtra teaches ten Bodhisattva arousals of mind, one being “I shall eliminate all doubtmind”. It further expounds the ten undoubting minds. Bodhisattvas generate ten resolves, such as the aspiration to guide sentient beings through the six perfections and to attain supreme perfect awakening. Abiding in such aspiration, they remain undoubting toward all BuddhaDharma.

(4) Proper repentance to purify karmic habits of doubt

*The Mahāyāna MindGround Contemplation Sūtra states: “Whoever repents in accordance with the Dharma shall eliminate all mental afflictions, just as the cosmicdissolution fire destroys Sumeru and the great oceans.” Repentance is like fire consuming the fuel of afflictions. Since doubt wastes wholesome affinities, one ought frequently to repent the karmic deeds of body, speech and mind created through past doubt. Following the repentance liturgies of the Avataṃsakasūtra, one repents sincerely throughout all space and the whole Dharmarealm, repenting not only for oneself but also on behalf of all sentient beings for their karmic habits of doubt. Practitioners should actively cast off inner afflictions rather than concealing their faults.

(5) Contemplating karmic causality, cultivating causes and conditions, making dedications and vows

Practitioners repeatedly reflect upon the homogeneous and maturational karmic fruits evoked by doubt, recognising the suffering it brings, and thereby develop wholesome fear of doubt’s harms. For instance, having doubted one’s parents may ripen into experiencing doubt from others in return; this awareness discourages acting upon doubt.

At the same time, one cultivates the causes of faith and dedicates merit with vows: may all sentient beings untangle the net of doubt, pull out the arrows of doubt and attain peace; may beings acquire unbreakable faith toward the Three Jewels and virtuous spiritual mentors. Two illustrative examples of karmic wisdom are offered: even knowing that another deceives you, cultivate the causes of trust, so that you may reap trust from others in future. Whether others act sincerely or falsely, preserve your own sincerity and do not allow doubt to ruin wholesome connections.

(6) Relying upon the empowering vows of Buddhas and Bodhisattvas

Ordinary beings possess limited wisdom and concentration and may rely upon the originalvow merits of Buddhas and Bodhisattvas. The Sūtra of Rain of Dharma tells of the Bodhisattva Sarvaāvaraṇavimokha: sentient beings who hear his name break free from the fetters of affliction. The Medicineguru Buddha Sūtra records that recollecting the name of Medicineguru Tathāgata exhausts the great river of afflictions, dispels ignorance and transcends doubt and other afflictions. When body, speech and mind align with the vows of Buddhas and Bodhisattvas, one may draw upon their empowering grace to counteract deepseated doubt.

Chapter 6  Bodhisattvas Actively Cultivate Faith and Liberate Beings Trapped in Doubt

For Bodhisattva practitioners, subduing personal doubt is merely the foundation. Their responsibility is to compassionately rescue beings mired in doubt rather than seeking personal emancipation alone. The Avataṃsakasūtra teaches that Bodhisattvas ought to attain “eloquence free from the darkness of doubt regarding all dharmas”,acquiring rhetorical skill to untangle beings’ net of doubt. They pursue the Dharma specifically to dispel others’ doubt, not for fame, gain or reverence.

This highlights an important spiritual perspective: Bodhisattvas cultivate faith among sentient beings. Faith does not arise spontaneously; it must be built. Two principles govern its establishment: truthful speech and fulfilling every promise one makes. Repeated broken promises prevent sentient beings from trusting the Bodhisattva; consistent reliability over time naturally draws their receptive faith. The text cites the anecdote of an old monk of Jiuhua Mountain whose body became a sacred relic: to keep a promise made to children, he travelled far to enquire vegetable prices and waited for days at the appointed place. In this way he cultivated the karmic causes of trust among sentient beings.

Bodhisattvas guide sentient beings employing the four means of attraction: giving, kind speech, beneficial conduct, and adaption to others. Through authentic words and deeds they nurture trust, and with skilful eloquence resolve others’ perplexities. Bodhisattvas understand karmic causality: to win others’ trust, one must first trust others oneself. Even when others are deceitful, one abides in sincerity and cultivates the conditions of trust; this constitutes the altruistic Bodhisattva practice. Bodhisattvas make great vows, courageously entering the defiled world of the five turbidity to accompany sentient beings, guiding them to cast off doubt and establish pure, unshakable faith, so that all may advance together toward Bodhi and liberation.

Chapter 7 Conclusion

Doubt, one of the fundamental mental afflictions, is defined as indecision concerning true principles. Bearing the qualities of obstructiveness, repulsiveness, illusoriness and corrosiveness, it generates eight secondary afflictions: lack of faith, mental distraction, lassitude, restlessness, forgetfulness of mindfulness, stinginess, deceit, and incorrect understanding, all of which harm virtuous roots and wholesome affinities for self and others. Transcending doubt and manifesting pure faith yields immeasurable sublime benefits, including irreversible Bodhicitta, inherent mental stillness, and constant association with virtuous spiritual companions.

Bodhisattva practitioners may subdue doubt by arousing firm Bodhivows, contemplating sentientbeing suffering to arouse great compassion and dedicate merit, generating the ten undoubting minds, practising proper repentance, reflecting on karmic causality together with dedications and vows, and relying upon the empowering grace of Buddhas and Bodhisattvas. Beyond eradicating their own doubt, Bodhisattvas actively cultivate faith among sentient beings: they act and speak truthfully, teach with skilful means, untangle the net of others’ doubt, and fulfil the Bodhisattva obligation of benefiting self and others.

Practitioners ought constantly to examine their own minds, detect subtle traces of doubt, and nurture pure faith. Thus they protect their own virtuous roots and, through compassion and skilful means, guide sentient beings to transcend doubt and advance toward awakening.

References

Ancient Texts (arranged chronologically by dynasty)

1. [Northern Liang] Dharmakṣema, Upāsakaśīlasūtra, Volume 7, Taishō Tripiṭaka, Volume 24.
2. [Tang] Śikṣānanda, The Avataṃsakasūtra, Volume 14, Taishō Tripiṭaka, Volume 10.
3. [Tang] Kuiji, Commentary on the Treatise on the One Hundred Dharmas of the Consciousnessonly School, Volume 1, Taishō Tripiṭaka, Volume 44.
4. [Tang] Xuanzang, Medicineguru Buddha Sūtra, Taishō Tripiṭaka, Volume 14.
5. [Tang] Prajñāmitra, The Śūraṅgamasūtra, Volume 4, Taishō Tripiṭaka, Volume 19.
6. [Tang] Dharmatrāta, Sūtra of Rain of Dharma, Volume 7, Taishō Tripiṭaka, Volume 16.
7. [Tang] Prajñā, Mahāyāna MindGround Contemplation Sūtra, Volume 3, Taishō Tripiṭaka, Volume 3.
8. [Tang] Daoxuan, The Commentarysubcommentary on the Fourpart Vinaya Precepttext, Volume 1, New Supplement to the Tripiṭaka, Volume 16.
9. [Song] Zixuan, Subcommentary on the Śūraṅgamasūtra, Volume 3, Taishō Tripiṭaka, Volume 39.
10. [Date unknown] Tsongkhapa, Lamrim Chenmo, Volume 1, Supplement to the Buddhist Canon, Volume 10.