Dharma · AI Companion

信力

śraddhā-bala

五力中能破疑惑的信心力量。AI-generated

Type Mental factorDifficulty IntroductoryTruth-level span outside the four-fold two-truths frameworkInitial AI estimate · evolves with use

A Contemporary ReadingAI-generated

What This Concept Is Talking About

In the Buddhist path to liberation, Xin Li (信力, *Śraddhā-bala*, translated as the "Power of Faith") is not passive belief or blind dogma. It is a transformative spiritual force—a state of pure, lucid, and unshakeable conviction in the Buddha (the Awakened One), the Dharma (the Truth/Teaching), the Saṅgha (the Noble Community), and the principle of karma (*yèguǒ*, 業果, cause and effect).

To fully understand *Śraddhā-bala*, one must see its exact position within the Buddhist framework of spiritual faculties and powers.

``` [Xin Gen (信根 / Faith-Root)] ──(Deepening & Maturation)──> [Xin Li (信力 / Faith-Power)] │ │ Spiritual Seed Unshakeable Force (Susceptible to doubt) (Impenetrable to Māra & illusions) ```

1. From "Root" to "Power": The Definition and Structure

In the canonical texts, spiritual development transitions from Xin Gen (信根, *Śraddhā-indriya*, the Root of Faith) to Xin Li (信力, *Śraddhā-bala*, the Power of Faith). As the *Mahāvaipulya Mahāsaṃnipāta Sūtra* (《大方等大集經》) notes, "faith-root and faith-power have no difference in essence" [12395]; however, the distinction lies in function. A root (*indriya*) takes firm hold in the soil of the mind, while a power (*bala*) is that same root grown so strong that no external storm can uproot it.

The *Saṃyukta Āgama* (《雜阿含經》) defines *Śraddhā-bala* as the pure confidence (*jìngxīn*, 淨信心) aroused by a noble disciple toward the Tathāgata, characterized as "firmly rooted at the foundation" (*gēnběn jiāngù*, 根本堅固) [7533]. It is a conviction so resolute that no force in the world—whether celestial beings (*devas*), Māra (demons/illusions), Brahmā, ascetics, brahmins, or anyone else—can shake or destroy it [7533, 7561, 7596].

Within the structural framework of the Five Powers (五力: Faith, 精進 Energy, 念/意 Mindfulness/Intent, 定 Concentration, 慧 Wisdom) [16133, 19467], *Śraddhā-bala* sits at the very head. It is also the gateway in the Three Powers, Four Powers, Seven Powers (七力), and Nine Powers (九力) [7530, 7534, 7582, 7607]. In the *Saṃyukta Āgama*, *Śraddhā-bala* is functionally identified with the Four Unshakable Purities (四不壞淨) [7553]—unbroken, pure faith in the Buddha, Dharma, Saṅgha, and the Noble Precepts (*śīla*).

2. The Functional Mechanism: How *Śraddhā-bala* Works

The classical sutras assign four explicit roles to *Śraddhā-bala*:

* Quenching the Raging Fire of Impermanence: The *Saṃyukta Āgama* uses the vivid metaphor of "extinguishing a fire burning on one's head or clothes" (火燒頭衣) [5497]. The five aggregates (*wǔyīn*, 五陰: form, sensation, perception, mental formations, consciousness / 色受想行識) are burning with the raging fire of impermanence (*wúcháng shènghuǒ*, 無常盛火) [5497]. *Śraddhā-bala* provides the immediate, decisive momentum to practice and extinguish this burning existential condition, leading to the destruction of all outflows (*yǒulòu*, 有漏 / defilements) [7583, 7591]. * Impenetrability to Deception (Defeating Māra): The *Mahāratnakūṭa Sūtra* (《大寶積經》) describes the absolute nature of *Śraddhā-bala*. Even if Māra transforms into the physical image of the Buddha and tells the practitioner, *"This teaching is not the true doctrine of the Buddha,"* the Bodhisattva endowed with *Śraddhā-bala* will not regress or lose joy in the Dharma [16133]. The sutra states: *"Even if the four great elements (earth, water, fire, air) were to interchange their fundamental physical natures, the Bodhisattva established in the power of faith and decisive understanding could never be swayed by Māra"* [16133]. * **Active Countermeasure across the Six Perfections (*Pāramitās*):** In the *Mahāratnakūṭa Sūtra*'s exposition of "Purity of the Five Powers" (五力淨), *Śraddhā-bala* is not merely an emotion, but a active neutralizing agent [19467, 19468]: * *Against Greed (慳貪):* It subdues stinginess and attachment [19467]. * *Against Precept-Breaking (毀戒):* It dissolves the accumulation of moral failures [19467]. * *Against Anger and Strife (瞋恚):* It severs the root of dispute and resentment [19467]. * *Against Indolence (懈怠):* It casts off laziness and mental lethargy [19468]. * *Against Delusion and Misconceptions (邪見):* It digests wrong views and cognitive biases [19468]. * Insight into Emptiness and Ultimate Truth: The *Mahāvaipulya Mahāsaṃnipāta Sūtra* elevates *Śraddhā-bala* to the realm of Ultimate Truth (*Paramārtha-satya*). Here, *Śraddhā-bala* manifests as deep conviction that phenomena are inherently unutterable (*fǎ bùkě shuō*, 法不可說), seeing the emptiness of phenomena (*jiàn fǎ kōng*, 見法空), observing signlessness and wishlessness (*wúxiāng wúyuàn*, 無相無願) [12394], and clearly perceiving that one's own physical body is an illusory illusion deceiving worldly beings (*kuànghuò fǎnfū yóurú huànxiāng*, 誑惑凡夫猶如幻相) [12395].


Walkthrough in Daily Life

To understand how *Śraddhā-bala* operates, we must trace it through modern life—where our attention, emotions, and decisions are constantly manipulated.

``` Modern Life Trigger Erroneous Mapping Canonical Xin Li (信力) ─────────────────── ───────────────── ─────────────────────── 1. Algorithmic doomscrolling & "I must build stronger self-confidence "Not following others' words" (不隨他語); media manipulation or emotional resilience." Seeing through illusions; unshakeable by Māra.

2. Exhaustion, burnout, aging, "My life is ruined; I need a temporary Recognizing the 5 aggregates as a "Raging Fire" and bodily sickness escape or better self-care." (五陰無常盛火) & an illusory construct.

3. Anxiety over career, money, "If I don't get immediate return on Practicing virtue with "No seeking of rewards" and social status investment (ROI), this is useless." (不求果報); deep trust in cause & effect. ```

Scene 1: Algorithmic Manipulation and the "Māra" of Information

* The Modern Context: You wake up, open social media, and are bombarded with outrage, doomscrolling content, hype, and fear-mongering notifications designed by algorithms to capture your dopamine and attention. A thought-leader or video claims: *"Everything you believed about career success or ethics is a lie; only wealth and power matter."* * Where People Map It Wrong: Most people view this as a battle of "willpower" vs. "distraction," or they mistake "faith" for stubbornly clinging to their personal opinions or identity politics. * **The *Śraddhā-bala* Walkthrough:** The classical definition describes *Śraddhā-bala* as being "unshakeable by Māra, celestial beings, or ascetics" [7533] and "not following others' words" (*bù suí tā yǔ*, 不隨他語) [13691]. When algorithmically induced panic hits, *Śraddhā-bala* acts as a cognitive filter. You recognize that external hype is merely conditioned phenomena (*saṃskṛta*). Just as the Bodhisattva is unmoved even if Māra appears in the form of a Buddha claiming the Dharma is fake [16133], the practitioner with *Śraddhā-bala* is entirely unswayed by viral panics, toxic trends, or manipulative rhetoric, because their trust rests on the timeless laws of impermanence, karma, and selflessness.

Scene 2: Career Burnout and Physical Deletion

* The Modern Context: You have been working 60 hours a week. Suddenly, a health crisis hits, or corporate restructuring renders your position obsolete. You feel deep despair, as if your identity has been erased. * Where People Map It Wrong: People often map "faith" here as positive thinking: *"Everything happens for a reason, I will get a better job next month!"* This is worldly optimism, not *Śraddhā-bala*. * **The *Śraddhā-bala* Walkthrough:** The *Saṃyukta Āgama* explicitly states that修持 *Śraddhā-bala* is designed to extinguish the "raging fire of the five aggregates" [5497]. Meanwhile, the *Mahāsaṃnipāta Sūtra* defines *Śraddhā-bala* as observing that "this body is composed of countless evils and deceives ordinary people like an illusion" [12395]. *Śraddhā-bala* allows you to step back and realize: *The body, sensations, and professional identity are impermanent, burning aggregates.* Instead of panicking when the illusory shell cracks, *Śraddhā-bala* gives you the calm, grounded power to look straight at impermanence without horror or dread [12150], maintaining pure inner clarity (*jìngxīn*, 淨心) despite external disruption.

Scene 3: Hyper-Transactional Relationships and the "ROI" Mindset

* The Modern Context: You act kindly toward a colleague, friend, or partner, but they respond with ingratitude or betrayal. You feel bitter, concluding that "being a good person doesn't pay off." * Where People Map It Wrong: People confuse faith in cause and effect (*karma*) with a transactional contract: *"I did good, so the universe owes me an immediate reward."* * **The *Śraddhā-bala* Walkthrough:** In the *Mahāvaipulya Mahāsaṃnipāta Sūtra*, true *Śraddhā-bala* when practicing generosity or ethical discipline means "not seeking rewards" (*bù qiú guǒbào*, 不求果報) [12394]. *Śraddhā-bala* is the deep, unshakeable comprehension of moral cause and effect (*yèguǒ*, 業果) [12393, 19220]. You understand that the act of purification itself is the immediate fruit. Furthermore, as noted in the *Mahāratnakūṭa Sūtra*, *Śraddhā-bala* directly neutralizes anger (*chēnhuì*, 瞋恚) and dispute [19467]. You do good not because external circumstances guarantee a payback, but because your faith in the purity of the Dharma is entirely self-sustained and independent of external feedback.


Why Contemporary People Need It

We live in an age characterized by ontological insecurity, algorithmic capture, and existential burnout. Truth has become fragmented, and trust in institutions, relationships, and the future has largely collapsed.

``` [Contemporary Malaise] [Dharma Medicine: Śraddhā-bala] ───────────────────────────────── ───────────────────────────────── • Attention fragmentation & hype • "Unshakable by external forces" (根本堅固) • Existential panic & aging dread • Quenching the 5-aggregate fire (斷無常盛火) • Transactional cynicism • Acting without seeking rewards (不求果報) ```

1. An Anchor in the Age of Synthetic Reality and AI: As artificial intelligence, deepfakes, and algorithmic engagement engines become indistinguishable from reality, the human mind is easily manipulated by artificial narratives designed to produce anxiety or rage. *Śraddhā-bala* provides an internal "epistemological rock." Because it is "not received from another's instruction" (*bù cóng tā jiào ér yǒu suǒ shòu*, 不從他教而有所受) [19467] and "does not follow others' words" [13691], a practitioner with *Śraddhā-bala* possesses an unassailable immunity to psychological conditioning. 2. Overcoming the Cognitive Exhaustion of Hyper-Individualism: Modern culture tells the individual: *"You are entirely responsible for creating your own meaning, brand, and salvation out of nothing."* This leads directly to depression and burnout. *Śraddhā-bala* connects the individual to universal principles—the law of cause and effect, the reality of impermanence, and the inherent capacity for awakening (Buddha-nature). It shifts the burden from fragile self-ego to reliance on timeless cosmic law (*Dharma*). 3. Insights from Neuroscience and Cognitive Psychology (and Their Limits): Contemporary neuroscience studies concepts like *cognitive grounding*, *locus of control*, and *psychological resilience*. Research shows that deep, value-based conviction alters neural circuitry, reducing amygdala reactivity to existential threat. *However, a critical distinction must be drawn:* Science studies *Śraddhā-bala* merely as a psychological state or brain mechanism that enhances stress tolerance or emotional regulation within the conditioned world (*saṃskṛta*). In contrast, Buddhist *Śraddhā-bala* is fundamentally transcendental (*lokottara*). Its ultimate goal is not mere stress management or optimal workplace performance, but the total eradication of all mental outflows (*yǒulòu*, 有漏) [7583], the insight into emptiness (*jiàn fǎ kōng*, 見法空) [12394], and complete liberation from the cycle of birth and death (*saṃsāra*).


Common Misunderstandings and Clarifications

``` Misunderstanding Clarification based on Classical Canon ──────────────── ─────────────────────────────────────── 1. "Faith means blind obedience or dogma." False. Śraddhā-bala is based on clear understanding (勝解 / 順解), non-dependence on authority, and direct insight into emptiness.

2. "Faith is just emotional optimism." False. It is an active power (力) that subdues specific defilements (greed, anger, laziness) and quenches the fire of the five aggregates.

3. "Faith is separate from wisdom." False. Śraddhā-bala includes seeing phenomena as empty, unutterable, and illusory. It is the basis for慧力 (Wisdom). ```

Misunderstanding 1: Confusing *Śraddhā-bala* with Blind Dogma or Anti-Intellectualism

* Clarification: In Western or post-secular contexts, "faith" is frequently conflated with believing propositions without evidence or submitting blindly to religious authority. In the Buddhist canon, *Śraddhā-bala* is precisely the opposite. The *Mahāratnakūṭa Sūtra* explicitly defines *Śraddhā-bala* as "not receiving blindly from another's instruction" (*bù cóng tā jiào ér yǒu suǒ shòu*, 不從他教而有所受) [19467] and calls it "pure, decisive understanding" (*qīngjìng shèngjiě*, 清淨勝解) [16133]. The *Mahāsaṃnipāta Sūtra* adds that it involves "deep understanding and compliance without lingering doubt" (*shēnxīn shùnjiě, bù zuò yíxīn*, 深信順解,不作疑心) [12393]. *Śraddhā-bala* is experiential verification matured into absolute certainty, not uncritical indoctrination.

Misunderstanding 2: Treating "Faith-Root" (*Xin Gen*) and "Faith-Power" (*Xin Li*) as Identical

* Clarification: Although the *Mahāsaṃnipāta Sūtra* states that "faith-root and faith-power have no difference in basic nature" [12395], they differ significantly in structural maturity and functional strength. *Xin Gen* (Faith-Root) is the initial planting of pure trust in the spiritual path; however, a root can still be dug up by intense intellectual doubts, severe tragedies, or demonic deceptions. *Xin Li* (Faith-Power) represents the stage where that root has grown so vast and impenetrable that no obstacle—whether physical torture, deceptive illusions, or mental despair—can sway the mind [16133].

Misunderstanding 3: Reducing *Śraddhā-bala* to a Merely "Emotional" Comfort

* Clarification: Modern practitioners often assume that faith is merely an emotional mood booster for beginners, whereas "real practice" consists only of silent meditation or intellectual study. The sutras reject this hierarchy. In the *Saṃyukta Āgama*, *Śraddhā-bala* is the primary driving engine required to put out the "raging fire of the five aggregates" [5497] and is ranked alongside Wisdom (*Prajñā-bala*) in every major list of spiritual forces (Three Powers, Four Powers, Five Powers, Seven Powers) [7530, 7534, 7549, 7582]. Furthermore, in the *Mahāsaṃnipāta Sūtra*, *Śraddhā-bala* directly incorporates the deepest wisdom insights: seeing phenomena as unutterable, contemplating emptiness, signlessness, and wishlessness, and realizing the illusory nature of the physical body [12394, 12395]. Without *Śraddhā-bala*, intellectual study remains dry speculation, and meditation easily succumbs to laziness, doubt, or deviation.

Canonical EntryAI-generated

1. 定义与核心要义

信力(śraddhā-bala)是佛教修行体系中的核心力量之一,指修行者对佛、法、僧及因果等生起清净、深入且坚固的信仰与信解,其本质是不可为任何外境或魔障所动摇的决定心。

在《雜阿含經》中,信力被定义为圣弟子对如来生起的清净、深入且坚固的信仰,具有“根本坚固”或“深入坚固”的特征,是世间任何力量(包括诸天、魔、梵、沙门、婆罗门及其他同法者)都无法动摇和破坏的。在五力的架构下,信力的具体内容等同于“四不坏净”,即对佛、法、僧及戒律坚固不坏的净信。

在《大寶積經》中,信力被定位为菩萨摩诃萨智德资粮的善巧之行,其核心在于“为欲成就信解心故”。经中将其赞叹为菩萨的“清净胜解忍受决定、坚固难坏、不可制伏”。

在《大方等大集經》中,信力是菩萨听闻深妙佛法而不生惊怖的重要保障,并且经中明确指出“信根信力无有差别”。

2. 主要阐述

信力在各经中的论述涵盖了其断惑消灾的功德、破除魔障的坚固性,以及在菩萨行中的具体表现:

一、 断除烦恼与解脱生死 《雜阿含經》以“火烧头衣”急需扑灭为喻,指出色、受、想、行、识等五阴的无常如同盛火,修行者为了断除这五阴无常之火,应当修持信力。同时,信力作为“七力”之一,修行者若能成就,便能“得尽诸有漏”或“疾断诸有漏”。在《大寶積經》中,信力天子亦赞叹“深心信清净”能使“一切烦恼尽”,达到“无能击难”的境界。

二、 破除魔障与不退转 《大寶積經》强调了信力在破除魔障时的绝对性。即使恶魔化现为佛陀的形象亲自来到菩萨面前,企图通过宣称“如是法者非佛正教”来动摇菩萨,使其远离正法智和胜解脱,菩萨也绝不会产生退转或不欣乐之心。经中以“假使四大之性互相转变,终不能使成就信力胜解菩萨为魔惑故信力倾动”来形容这种信仰的坚固。在《大方等大集經》中,信力的最高境界被总结为“心于菩提无有退转,是名信力净信力行”。

三、 对空性与深妙法的信解 《大方等大集經》将信力深入到第一义谛,表现为“信心法不可说”、“见法空”以及“能观见无相无愿”。此外,能够“观察是身无量众恶之所成就,诓惑凡夫犹如幻相”亦是信力的表现。

四、 在“五力净”中的具体对治功能 《大寶積經》详细展开了“信力”在修行实践中的具体功德与对治力量。信力不仅能使菩萨成就“诸根澹泊不坏笃信”、“不从他教而有所受”、“常得至诚七财之货”,还能在六度层面广泛对治恶行与烦恼:对治悭贪(“制悭贪垢秽之难”)、对治毁戒(“释除一切毁戒之聚”)、对治瞋恚(“离于诤讼瞋恚之本”)、对治懈怠(“弃捐懈怠众秽尘垢”)、对治邪见与杂染(“消化诸垢众邪之行”并“弃于诸见所识众垢”)。

《大方等大集經》亦指出,菩萨“住信力时”能产生诸多断恶修善的破障力量,包括在思想上“不随他语”且“具得解力”,能“远离无明”;在戒行与离欲上能“见悭罪过”、“离一切破戒之垢”,并“远离一切怱务之事”;在烦恼调伏上能“远离瞋心”与“远离懈怠”。

3. 不同部类与译本的表述差异

在不同的经典和译本中,关于“信力”的术语形式、组合及具体译名存在显著差异:

一、 诸力组合的差异 - 《雜阿含經》:信力与其它修行力量共同构成多种修行体系,其术语形式和组合极多: - 三力:包括“信力、精进力、慧力”、“信力、念力、慧力”以及“信力、定力、慧力”三种形式。 - 四力:包括“信力、精进力、念力、慧力”与“信力、念力、定力、慧力”。 - 五力:即“信力、精进力、念力、定力、慧力”。 - 五学力:经中有两种记载,第一种指“信力是学力、精进力是学力、惭力是学力、愧力是学力、慧力是学力”;第二种指“信力、精进力、念力、定力、慧力”。在此脉络下,信力被称为“信力是学力”。 - 七力:由“信力、精进力、惭力、愧力、念力、定力、慧力”组成。 - 九力:在七力的基础上加入“数力、修力”。 - 《大方等大集經》:将信力列为菩萨“四力”之首,其组合为“信力、进力、念力、慧力”。

二、 译名与术语的独特变化 - “净信力”与“信力”:在《大寶積經》中,论及菩萨于生死中坚固勇猛的“八力”时,使用了“净信力”这一术语,其核心内涵是“深信业报”,并能“了知业报,信于佛智,摄受世间”。而在《大方等大集經》中,则以“信力净信力行”来总结信力的最高境界。 - “意力”替代“念力”:在《大寶積經》论述“五力净”时,采用了独特的译名,将通常的“信力、精进力、念力、定力、慧力”表述为“信力、精进力、意力、定力、慧力”,即以“意力”替代了“念力”,并解释“意力”为“其意势强”、“逮得总持不共道意”等。 - “三十七助菩提之法”:《大方等大集經》(昙无谶译)中,将通常所说的“三十七道品”或“三十七菩提分法”译为“三十七助菩提之法”。 - “五阴”与“身”:《雜阿含經》使用“五阴”来描述无常之火;而《大方等大集經》则用“是身无量众恶之所成就”来表达对身体幻相的观察。

4. 与相关概念的关系

一、 与五力、七力、九力等修行体系的关系 信力在佛教诸力修行体系中均居于首位。无论是《雜阿含經》中的三力、四力、五力、五学力、七力、九力,还是《大方等大集經》中的四力、《大寶積經》中的五力,信力都是一切修行力量的起点与基石。佛陀多次告诫比丘,应当将成就信力作为自觉的修学目标,要求比丘发愿“我当成就信力”、“我当勤加精进,成就信力……” 或“我成就信力……”。

二、 与四不坏净的关系 在《雜阿含經》中,信力的具体内容被等同于“四不坏净”,即对佛、法、僧及圣戒的坚固不坏净信。这表明信力并非盲目的信仰,而是建立在对三宝及戒律清净理解基础上的坚固信念。

三、 与信根的关系 《大方等大集經》明确指出“信根信力无有差别”,指出信根作为修行的基础扎根,与信力作为产生实际破障效用的力量,在本质上是同一修行特质的不同阶段或侧面。

四、 与六度万行的关系 在菩萨行中,信力与六度紧密相连。在《大寶積經》中,信力是净化和对治六度中悭贪、毁戒、瞋恚、懈怠、邪见等恶行的先导力量。在《大方等大集經》中,行持布施、持戒、忍辱等波罗蜜时,信力表现为“不求果报”或“不求其果”的无所得心。

5. 代表性原文引用

1. 《雜阿含經》:“何等為信力?謂聖弟子於如來所起淨信心,根本堅固,諸天、魔、梵、沙門、婆羅門,及餘同法所不能壞,是名信力。” 2. 《雜阿含經》:“若色是無常盛火,受、想、行、識是無常盛火。為斷彼無常盛火故,當修信力……” 3. 《大寶積經》:“假使四大之性互相轉變,終不能使成就信力勝解菩薩為魔惑故信力傾動。” 4. 《大寶積經》:“信力者,諸根澹泊不壞篤信,不從他教而有所受,能具足誠信之勢,制慳貪垢穢之難,釋除一切毀戒之聚,離於爭訟瞋恚之本。” 5. 《大方等大集經》:“於佛正法深信順解,不作疑心,深信業果,是名信力。” 6. 《大方等大集經》:“心於菩提無有退轉,是名信力淨信力行。”

By SutraAI-generated

雜阿含經T0099 · 阿含部

核心表述:信力在本經中被定位為五力之首,是「能破疑惑」的信心力量。經中對信力給出兩種主要定義。

第一義:對如來之堅固淨信。「何等為信力?謂聖弟子於如來所入於淨信,根本堅固,諸天、魔、梵、沙門、婆羅門及諸同法所不能壞,是名信力」;七力經中作「於如來所起信心,深入堅固,諸天、魔、梵、沙門、婆羅門及餘同法所不能壞,是名信力」;學力經中作「於如來所善入於信,根本堅固,諸天、魔、梵、沙門、婆羅門及餘同法所不能壞」。三處用詞微有出入:或作「淨信」,或作「信心」,或作「善入於信」;「根本堅固」與「深入堅固」互見。但核心內涵一致:聖弟子對如來所起之信,堅固不為諸天、魔、梵、沙門、婆羅門及同法所壞。

第二義:四不壞淨。「彼信力,當知是四不壞淨」,將信力具體落實為佛、法、僧、戒之四不壞淨。

與其他四力的具體配對。「彼信力,當知是四不壞淨;精進力者,當知是四正斷;念力者,當知四念處;定力者,當知是四禪;慧力者,當知是四聖諦」,以五力分別配對三十七菩提分法的具體項目。

信力在不同力數組合中的位置。經中以信力為首,列於三、四、五、七、九等不同力數結構:三力有「信力、精進力、慧力」,或「信力、念力、慧力」,或「信力、定力、慧力」三種組合;四力有「信力、精進力、念力、慧力」與「信力、念力、定力、慧力」,另有「覺力、精進力、無罪力、攝力」之異說;五力為「信力、精進力、念力、定力、慧力」;五學力為「信力、精進力、慚力、愧力、慧力」;七力為「信力、精進力、慚力、愧力、念力、定力、慧力」;九力為「信力、精進力、慚力、愧力、念力、定力、慧力、數力、修力」。

信力「破疑惑」之功能運用。以火燒頭衣為喻:「頭衣燒然尚可暫忘,無常盛火當盡斷。為斷無常火故,當修信力……謂斷色無常故,當修信力,斷受、想、行、識無常故,當修信力」。此處信力被列為對治無常之修習對象,與精進、念、定、慧力共成五力,用以斷五蘊之無常。

信力與如來十力並列。「五學力、十種如來力。何等為五學力?謂信力、精進力、念力、定力、慧力」,將信力列為五學力之首,與如來十種智力並舉。

偈頌表述。「信力精進力,慚力及愧力,正念定慧力,是說名七力,成就七力者,得盡諸有漏」;另作「信力精進力,及說慚愧力,念力定慧力,是名為七力。七力成就者,疾斷諸有漏」。兩偈皆以信力列首,標明成就七力可得盡諸有漏。

整體而言,本經以「聖弟子於如來所起堅固不壞之信」為信力核心定義,反覆將其列於三、四、五、七、九力之首,並配四不壞淨為具體修持內容,凸顯信力在解脫道中的基礎地位。

大寶積經T0310 · 寶積部

《大寶積經》中對「信力」的論述,可從其位列「五力」之首的脈絡加以觀察。

一、五力體系中的信力地位。本經在〈智德資糧善巧〉一段中,將信力與進力、念力、定力、慧力並列為菩薩五種勝力,明確說「具足信力,為欲成就信解心故」。後文又於〈般若波羅蜜多分〉重述此五力——「信力、精進力、念力、定力、慧力」,並逐一詳釋。值得注意的是,本經另有一段〈五力淨行〉之文,在列舉五力時將通常稱為「念力」者稱作「意力」,文云:「其意力者,逮得總持不共道意」,與前兩段所用的「念力」一詞形成用詞差異,此為本經特有的名相現象,於歸一記錄中應予保留。

二、信力的核心義涵——不可破壞的清淨勝解。本經以「清淨勝解忍受決定、堅固難壞、不可制伏」定義信力,強調此力具備耐受、決定、堅固三相,能抵禦外境動搖。文殊設喻:即使惡魔化為佛像前來障礙,令菩薩於正法智及勝解脫生起厭離,並妄稱「如是法者非佛正教」,信力勝解之菩薩仍不為魔惑而傾動;乃至「四大之性互相轉變,終不能使……信力傾動」。此段以魔化佛像為難,凸顯信力於邪正辨別中之不動特性。

三、信力的多種功德功能。〈五力淨行〉廣列信力之效用,包括:「不從他教而有所受」、「則能具足誠信之勢」、「能制慳貪垢穢之難」、「釋除一切毀戒之聚」、「離於諍訟瞋恚之本」、「消化諸垢眾邪之行」、「棄於諸見所識眾垢」、「常得至誠七財之貨」等。末後總結:「無能破壞心常清淨,是為信力」,點出信力本質為「常清淨」之不可壞心。

四、經中亦見「信力天子」之名,文云「爾時信力天子說偈讚曰」,顯示此概念於本經亦被擬人化為天人,於法會中以偈頌讚歎。

綜上,《大寶積經》論信力,側重其「清淨勝解、堅固難壞」之質性,並以魔化佛像為障之譬喻強調其破疑惑、辨邪正之力用;於五力體系中,信力恆居首位,其餘四力之稱謂則在〈五力淨行〉與前段略有出入(念力/意力),此為本經譯文的獨特用詞。

大方等大集經T0397 · 大集部

《大方等大集經》論「信力」,並非以單一定義涵蓋,而是於不同力之體系中層層展開,呈現多重面貌。

一、體系定位。本經至少出現三種含攝信力之力之體系:(一)「八力」——信力與善友力、多聞力、善根力、善思惟力、破憍慢力、大慈悲力、如法住力並列,為菩薩聞深佛法不生怖畏之八種力;(二)「四力」——信力與進力、念力、慧力並舉,此分法中未獨立列出定力;(三)「五力」——信力與進力、念力、定力、慧力並列,為較完整之五力分法。四力與五力兩種分法並存於本經,為其結構上一值得留意之處。

二、核心表述。本經對信力之根本界定為「於佛正法深信順解,不作疑心,是名信力」。又云「觀疑網故,名為信力」、「信佛法者,是名信力」、「信業果者,是名信力」、「喜者名信」,皆以「無疑」、「深信」為信力之核心特質,與「能破疑惑」之通義相應。

三、多層次之行相界定。本經以層疊方式界定信力,幾乎每一波羅蜜與觀行皆有其相應之信力相貌:見法空、觀無相無願、信「信心法不可說」、信勤精進得菩提非由懈怠;於布施、持戒、忍辱,皆以「不求果報」為信力之判準;聞波羅蜜與三十七助菩提法而不疑;為眾生修集慈心。此種將信力貫穿六度乃至助道品之表述,是本經較獨特之側面。

四、信根與信力之關係。本經明言:「信根信力無有差別,進根進力、念根念力、慧根慧力,亦復如是。」,將信力與信根視為本質相同,僅為修行層位之別名。

五、住信力之實踐行相。於「住信力」之具體功德,本經列舉:住信力時不隨他語、具得解力、見慳罪過、能離一切破戒之垢、遠離瞋心、遠離懈怠、遠離一切怱務之事、遠離無明、具足七力。又以「心於菩提無有退轉,是名信力淨信力行」 作結,將對菩提之不退轉心標為信力之清淨行相。

總結而言,本經論信力兼及「破疑惑」之通義,然更側重以「不求果報」、「深信無疑」、「心不隨他語」等具體行相界定信力;於體系上兼用四力與五力兩種框架,並以「信根信力無有差別」之獨特表述揭示信力與信根之同一性。

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