Dharma · AI Companion

水災

ap-saṃvartanī

坏劫中以洪水毁坏世界的灾变。AI-generated

Type PhenomenaDifficulty IntroductoryTruth-level span I · dependent arisingInitial AI estimate · evolves with use

A Contemporary ReadingAI-generated

What This Concept Is Saying: The Thermal Dissolution of World-Systems

In Buddhist cosmology, the physical universe is not an eternal stage, nor is its destruction a mere random geological accident. The world-system cycles eternally through four great epochs: Formation (*Vivartakalpa* / 成劫), Existence (*Vivartasthāyikalpa* / 住劫), Destruction (*Saṃvartakalpa* / 坏劫), and Emptiness (*Saṃvartasthāyikalpa* / 空劫).

When the Epoch of Destruction arrives, the world-system is dismantled by one of the "Three Great Calamities" (大三灾): Fire (*tejo-saṃvartanī* / 火灾), Water (*ap-saṃvartanī* / 水灾), and Wind (*vāyu-saṃvartanī* / 风灾).

Among these three, Water Disaster (*ap-saṃvartanī* / 水灾) represents a deeper, more radical level of cosmic dissolution than Fire. While the Fire Disaster burns away the lower realms up to the Light-Sound Heaven (*Ābhāsvara* / 光音天, the 2nd Dhyāna realm), Water Disaster ascends even higher. Its ultimate ceiling—termed the "Upper Boundary" (上际)—reaches all the way to the Subhakṛtsna Heaven (*Śubhakṛtsna* / 遍净天), the highest realm of the Third Dhyāna (*三禅天*).

``` [ Buddhist Cosmic Calamities Ceiling ] +-----------------------------------------------------------------------------------+ | 4th Dhyāna Realm: Fruitful Heaven (果实天 / Punyaprasava) <--- Upper limit of WIND Disaster +-----------------------------------------------------------------------------------+ | 3rd Dhyāna Realm: Śubhakṛtsna Heaven (遍净天) <--- Upper limit of WATER Disaster +-----------------------------------------------------------------------------------+ | 2nd Dhyāna Realm: Ābhāsvara Heaven (光音天) <--- Upper limit of FIRE Disaster +-----------------------------------------------------------------------------------+ | 1st Dhyāna & Desire Realms (Human Realm, Mt. Sumeru, Hell Realms) +-----------------------------------------------------------------------------------+ ```

1. The Precursor: Mass Evacuation via "Joyless Third Dhyāna"

The destruction does not catch sentient beings unawares. Before the deluge descends, a universal spiritual awakening occurs. Sentient beings who have cultivated meditative states display the peaceful bliss of the "Joyless Third Dhyāna" (*无喜第三禅 / 无喜第三禅道*).

Why is it called "Joyless"? In Buddhist meditation, the First and Second Dhyānas feature a coarse emotional surge of rapture/joy (*pīti* / 喜). In the Third Dhyāna, this coarse emotional thrill is quieted into a deep, steady equanimity (*upekkhā*) and refined tranquility (*sukha*). Hearing of this serene, unshakeable peace, beings across all lower realms—from the deepest hells (*Avīci*), animals, ghosts, humans, up to the Six Heavens of the Desire Realm (*欲界六天*) and the First/Second Dhyāna Form Realms—successively reincarnate in the human realm, practice this Third Dhyāna, and ascend to the Śubhakṛtsna Heaven (*遍净天*).

Only when every single conscious being has evacuated to the Śubhakṛtsna Heaven, leaving the lower cosmic structures completely empty, does the destruction begin.

2. The Process: Scalding Dissolution

Water Disaster is not a gentle deluge or an ocean flood; it is an intense, thermal-chemical dissolution caused by torrential scalding hot water (*降大热水雨*).

A massive black cloud stretches up to the Śubhakṛtsna Heaven and rains down boiling, highly corrosive water. The process moves from top to bottom: * The Heavenly Palaces: The celestial realms of the Second Dhyāna (such as Light-Sound Heaven / *光音天宫*) and First Dhyāna (*梵迦夷天宫* / Brahmā palaces), along with the heavens of the Desire Realm (*炎摩天*, *兜率天*, *化自在天*, *他化自在天*), are boiled away without a trace. * The Physical World: The four Great Continents, Mt. Sumeru (*须弥山王*), and all vast mountain chains melt away. The canonical scriptures use a precise metaphor for this dissolution: "like butter placed in fire" (*犹如酥油置于火中*). * The Subterranean Foundations: The boiling torrent continues downward until the ground, the subterranean water layer beneath the earth, and even the subterranean wind layer supporting the ocean are utterly consumed (*"地下水尽,水下风尽"*). The cosmos is reduced to absolute physical emptiness.

3. Restoration: The Four Winds and the Saṃgha Wind

After eons of empty void, the world begins to rebuild (*还复*). Giant clouds once again fill the space up to the Śubhakṛtsna Heaven, raining down drops as large as chariot wheels for millions of years.

To keep this vast ocean of space-water from dispersing, Four Great Winds arise to hold it in place: 1. Storing Wind (*住风*): Stabilizes the water in space. 2. Holding Wind (*持风*): Prevents the water from scattering. 3. Unmoving Wind (*不动*): Prevents internal turbulence. 4. Solid Wind (*坚固*): Creates a rigid structural container out of force.

As the water level subsides, a special dynamic wind named the Saṃgha Wind (*僧伽风*) blows across the surface, agitating the water to create a dense foam. The wind lifts this foam into the void, where it hardens into the celestial palaces of the lower Form Realm and Desire Realm, re-establishing the structural layers of the physical world.


A Walk-Through in Daily Life: The Anatomy of a Total Burnout

While cosmic Water Disaster describes the dissolution of world-systems, Buddhist cosmology is fundamentally a mirror of the mind (*心*). The outer world-system is sustained by the collective karma of sentient beings; thus, the cycle of *Formation, Existence, Destruction, and Emptiness* plays out continuously in our contemporary personal lives—most visibly in the experience of systemic emotional burnout and identity collapse.

``` [ Stage 1: Warning ] --------> [ Stage 2: Boiling Deluge ] --------> [ Stage 3: Rebuilding ] Cultivate Third Dhyāna Hot water melts identity Four Winds & Saṃgha Wind (Step back from hype/joy) "Like butter placed in fire" (Stability, structure, action) ```

Step 1: The Gathering Cloud & Cultivating the "Joyless Third Dhyāna"

Imagine a contemporary professional working in a high-pressure environment—surrounding themselves with intense algorithmic feeds, career ambition, social comparison, and relationship anxiety. This is the Desire Realm (*欲界*).

When a major crisis looms (a corporate restructuring, a broken relationship, a existential health crisis), chasing excitement or relying on "toxic positivity" (the coarse joy / *喜* of the First and Second Dhyānas) stops working. The hype fails.

* The Mapping: To survive the impending crisis without losing one's mind, one must retreat to the "Joyless Third Dhyāna" (*无喜第三禅*). * The Misconception: People often misinterpret "joyless" as falling into depression or becoming cold. In reality, it means stopping the chase for emotional highs. It is stepping back from performance metrics, social media validation, and manic optimism. You move your core identity into a quiet, grounded equanimity (*Śubhakṛtsna / 遍净天*), realizing that your true worth does not depend on the external project staying afloat.

Step 2: The Scalding Water & The Melting of Ego-Structures

The crisis hits: the project fails, the company goes under, or the relationship ends. The experience is not cold or silent; it is a scalding deluge of hot water (*降大热水雨*).

* The Mapping: The boiling water represents the thermal, dissolving intensity of unchecked grief, anxiety, and systemic breakdown. * The Butter Metaphor: Your titles, your polished LinkedIn profile, your mental self-images—these celestial palaces (*光音天宫*, *炎摩天宫*)—begin to melt "like butter placed in fire" (*犹如酥油置于火中*). It doesn't just scratch the surface; it melts your foundational routines (Mt. Sumeru) and even your deepest unconscious habits (*地下水尽,水下风尽*). * The Crucial Insight: If you managed to retreat to inner equanimity (the Third Dhyāna ceiling), your *identity* survives even while your external world melts to zero.

Step 3: Reconstruction through the Four Winds

After total collapse, you are sitting in the empty void of a cleared calendar and a stripped-away identity. How do you rebuild? You cannot rush into immediate action; you must rely on the Four Winds:

1. Storing Wind (*住风*): Giving yourself permission to rest and stay still in the empty space without panicking. 2. Holding Wind (*持风*): Holding a clear, uncorrupted core intention of sanity and ethical living. 3. Unmoving Wind (*不动*): Remaining unswayed by FOMO (Fear Of Missing Out) or impulse reactions. 4. Solid Wind (*坚固*): Establishing basic, firm daily habits (sleep, simple food, honest speech).

Once these four forces stabilize your inner state, the Saṃgha Wind (*僧伽风*)—the wind of dynamic, collaborative action and social connection—begins to stir the quiet pool of your life. It blows the "foam" of new ideas and fresh opportunities into solid, beautiful structure, rebuilding your daily existence on a cleaner foundation.


Why Contemporary People Need This Concept

1. Beyond "Linear Progress": Understanding Structural Breakdown

Modern secular culture is built on the myth of linear progress—the assumption that technology, careers, and personal lives should infinitely grow upward. The Buddhist doctrine of *ap-saṃvartanī* provides a sobering, realistic alternative: all conditioned systems inevitably reach a limit where they must dissolve.

Recognizing that destruction (*坏劫*) is a structural phase of existence prevents modern individuals from viewing personal or societal collapses as cosmic errors or personal punishments. It reframes breakdown as a natural clearing of outdated Karma and structures.

2. The Depth of Water vs. Fire

Fire burns what is combustible on the surface. But Water dissolves from within.

In our contemporary digital culture, we are swimming in an information ocean—algorithms, notifications, and endless streams of data. This digital environment operates much like the deluge of scalding water: it does not violently blow things up; instead, it slowly, thermally dissolves our attention spans, deep memory, and sense of self. Understanding the concept of Water Disaster helps us recognize when our cognitive structures are being "dissolved like butter" by over-saturation, highlighting the urgent need to retreat to higher mental quietude (*Dhyāna*).

3. Modern Analogies & Their Boundaries

We can draw parallels between Buddhist cosmology and modern scientific models:

| Aspect | Classical Buddhist Cosmology | Contemporary Analogy (AI / Thermodynamics) | | :--- | :--- | :--- | | Destruction Mechanism | Scalding water dissolving physical & celestial realms (*降大热水雨*) | Thermal entropy / Information saturation corrupting system memory | | Evacuation Strategy | Ascending to higher Dhyāna realms via mental training (*无喜第三禅*) | Data backup / Decoupling core logic from unstable runtime environments | | Reconstruction | Four Winds stabilizing primordial ocean (*住、持、不动、坚固风*) | System reboot, error-correction algorithms, and structural recalibration |

*Note on Limitations*: While these analogies help us visualize the process, they are not identical. Modern scientific models (like thermodynamic entropy or computer crash cycles) deal purely with physical matter and data. Buddhist cosmology is fundamentally rooted in **karma (*业力*) and mind (*心*)**. The Water Disaster is not a random physical disaster; it is the physical manifestation of the collective mind's cyclic karma. Science describes *how* physical systems decay; Buddhism reveals *why* conscious experience cycles through suffering and how mind can transcend it.


Common Misreadings and Clarifications

Misreading 1: "Water Disaster is just a localized flood story, like Noah's Ark."

* Clarification: In Western mythic traditions, floods are typically localized terrestrial disasters sent by divine forces to punish bad behavior on Earth. In Buddhist cosmology, *ap-saṃvartanī* is a cosmic-scale elemental transformation. It affects higher celestial realms (up to the Third Dhyāna Heaven), dissolves subterranean physical forces (*地下水*, *水下风*), and operates purely according to natural karmic laws (*dhamma-niyāma*) across entire world-systems, without a central judge or punisher.

Misreading 2: "Water Disaster means being drowned in cold ocean water."

* Clarification: The canonical texts (such as the *Dīrgha Āgama* / 《长阿含经》) explicitly specify that the deluge consists of "scalding hot water" (*降大热水雨*). Its core dynamic is not drowning or smothering, but thermal dissolution and boiling (*煎熬消尽*). The texture of this destruction is described as "butter placed in fire" (*犹如酥油置于火中*)—a process of melting complex structures back into raw, unformed elements.

Misreading 3: "The 'Joyless Third Dhyāna' means becoming emotionally numb or depressed."

* Clarification: In modern language, "joyless" sounds negative or depressive. However, in Buddhist meditative terminology, "joy" (*pīti* / 喜) refers to a coarse, agitated emotional excitement or thrill. The Third Dhyāna abandons this turbulent emotional surge to enter an infinitely deeper, smoother state of **refined tranquility (*sukha*) and equanimity (*upekkhā*)**. It is not emotional numbness, but the highest, most stable form of mental peace attainable within the Form Realm—which is precisely why it provides immunity against the scalding dissolution of the lower worlds.

Canonical EntryAI-generated

一、 定义与核心要义 水灾(梵语:ap-saṃvartanī)是佛教宇宙观中毁灭世间的三大灾劫(火灾、水灾、风灾)之一。根据《长阿含经》的系统论述,当世间坏劫到来、水灾发起之时,其毁灭的最高界限(即「上际」)可以达到色界第三禅的「遍净天」。水灾的本质是由具有极强消融力的「热水」暴雨,自上而下将天界、器世间乃至大地、地下水、水下风全部煎熬消融殆尽的过程。这一灾劫不仅代表了物质世界的彻底毁灭,也伴随着众生通过特定禅定修行向更高天界的大规模迁移与避难。 二、 主要阐述 根据经典记载,水灾的发生经历了一个从众生避难、世间空化,到热水毁灭,再到风力复原的完整周期: 1. 众生避难与世间空化:在水灾即将发起之前,世间会显现出特殊的救度前兆。此时,世间的人类皆奉行正法与十善业。若有修行者率先修得「无喜第三禅」(又称「无喜第三禅道」),便能凭借神通升至虚空中,向世人宣告此禅定所带来的无上之乐。世人听闻之后,纷纷效仿修习此道,命终之后皆得以升天,往生至水灾无法波及的「遍净天」。随后,其余各道众生——包括地狱、畜生、饿鬼、阿须伦,以及欲界诸天(四天王天、忉利天、炎摩天、兜率天、化自在天、他化自在天)、色界梵天和光音天的众生,在命终后都会先投生于人间,同样通过修习「无喜第三禅道」获得解脱,并在命终后悉数往生至「遍净天」。至此,从最底层的地狱直至色界的光音天,所有众生皆已迁往遍净天,整个器世间彻底空无一人,灾劫正式降临。 2. 水灾的毁灭过程:当众生尽数撤离、世间完全空化之后,天空中突然暴起巨大的黑云,这股黑云一直向上延伸到遍净天,并开始降下巨大的「热水」暴雨。这股沸腾且具毁灭性的热水开始自上而下「煎熬」并消融一切天界与世间:首先,光音天宫、梵迦夷天宫以及欲界诸天的宫殿(包括他化自在天、化自在天、兜率天、炎摩天宫等)在热水的煎熬下完全消尽,毫无残留,其消融的状态被形容为「犹如酥油置于火中」迅速化去。接着,热水继续向下浸泡并煎熬器世间,使人类所居的四天下、八万天下、世间的诸山、大山以及须弥山王,也同样如酥油般消融殆尽。最后,热水煎熬大地,直至大地、地下水以及水下的风全部消尽,即达到「地下水尽,水下风尽」的彻底虚无状态,水灾的毁灭过程至此结束。 3. 水灾后的世间复原:毁灭之后,世间进入重新建立的「还复」阶段。大黑云再次充满虚空,一直延伸到遍净天,并降下如车轮般大小的巨型雨滴。这场大雨持续了无数百千万年,使得虚空中的积水逐渐增长。此时,有四种大风负责维持这些积水不使其散落,这四种风在经中被明确命名为「住风」、「持风」、「不动」与「坚固」。随着水分的逐渐减少,一种名为「僧伽」的大风开始吹动积水,使其表面鼓荡起泡沫并逐渐积聚。风将这些泡沫吹离水面,使其在虚空中自然坚固,重新化现为由七宝装饰的「光音天宫」与「梵迦夷天宫」等天界建筑,并最终使残留的水分汇聚为海水,恢复其咸苦之性,从而完成了整个世间的重建与复原。 三、 不同部类与译本的表述差异 在《长阿含经》对水灾的论述中,存在许多独特的译名与术语表述,这些用词与其他经典或译本存在明显差异: 1. 禅定名称的独特表述:本经在描述众生避难所修持的禅定法门时,特称为「无喜第三禅」或「无喜第三禅道」,用以强调该禅定超越了前二禅的喜乐,是通往遍净天的关键。 2. 天界译名的差异:对于欲界第三天,本经译为「炎摩天」,而非常见的「夜摩天」或「焰摩天」;对于色界初禅天,本经译为「梵迦夷天宫」,用以指代梵众天或梵天之宫殿。 3. 风名的独特汉译:在世间复原阶段,本经给出了非常具体的风力名称。负责持水不散的四种大风被译为「住风」、「持风」、「不动」与「坚固」;而负责吹拂积水泡沫、凝聚化现天宫的特定大风,则被音译为「僧伽」风。这些特定的译名构成了本经宇宙论的独特术语体系。 四、 与相关概念的关系 1. 与「三灾」的关系:水灾与火灾、风灾共同构成了佛教坏劫中的「大三灾」。其中,火灾的破坏力最弱,其上际仅至光音天;水灾的破坏力强于火灾,其上际可达到遍净天;而风灾的破坏力最强,其上际可达果实天。水灾在三灾中处于承前启后的位置。 2. 与「遍净天」的关系:遍净天(Śubhakṛtsna)是色界第三禅的最高天。在水灾中,遍净天具有双重身份:一方面,它是水灾破坏的「上际」或极限,水灾之水至此而止,不坏遍净天本身;另一方面,它又是所有众生在灾难来临前的终极避难所,众生皆因修习第三禅而往生于此以躲避水劫。 3. 与「无喜第三禅」的关系:此禅定是连接众生与遍净天的桥梁。在水灾爆发前,众生必须在人间修得「无喜第三禅道」,方能脱离即将被热水消融的欲界与色界低天,顺利往生遍净天。 五、 代表性原文引用 1. 关于水灾的破坏界限:「世有三災。何等為三?一者火災,二者水災,三者風災。有三災上際。葉何為三?火災上際至光音天,水災上際至遍淨天,風災上際至果實天。」 2. 关于众生修禅避难与热水降下:「時,彼眾生聞已,即修無喜第三禪道,身體枯燥,命終生遍淨天……盡入遍淨天已。此時世間空無眾生。然後天起大黑雲,上至遍淨天,降大熱水雨……」 3. 关于热水消融世间与风力复原:「其水煎熬此世間,皆悉消盡,無有遺餘,猶如酥油置於火中……地下水盡,水下風盡……有大風起,名曰僧伽,吹其水沫,積聚空中,自然堅固,化成七寶光音天宮、梵迦夷天宮……」

By SutraAI-generated

長阿含經T0001 · 阿含部

《長阿含經》將水災置於「三災」框架中論述:世有三災——火災、水災、風災,各有其「上際」(毀壞所至的最高天界),火災至光音天為際,水災至遍淨天為際,風災至果實天為際。水災的破壞上限即遍淨天,意謂遍淨天以下一切宮殿、山川、大地皆為水所消盡。

經中又先立「四事長久」為時間背景:世間災漸起壞此世、世間壞已中間空曠、天地初起向欲成、天地成已久住不壞,四者皆「無量無限,不可以日月歲數而稱計」。水災即屬第一事「災漸起壞此世」之階段。

水災將起之因緣:此世間人皆奉正法、正見不邪見、修十善業;時有人得「無喜第三禪」,踊身上昇虛空,住聖人道、天道、梵道,高聲唱言勸眾人修第三禪。此與火災起時勸修第二禪、風災起時勸修第四禪形成對應——三災各以一禪為眾生遷移之階。

水災正壞之相:大水先浸遍淨天宮,「猶如酥油置於火中,無有遺餘」,天宮煎熬消盡;其後此雨復浸四天下及八萬天下、諸山、大山、須彌山王,「煎熬消盡,無有遺餘」;最終「地下水盡,水下風盡」,一切蕩然無存。經文於此反覆唱嘆:「一切行無常,為變易法,不可恃怙,凡諸有為甚可厭患,當求度世解脫之道。」此為水災敘事中的核心法義收束。

水災還復之相:壞盡之後「久久」,有大黑雲充滿虛空、至遍淨天,周遍降雨,渧如車輪,無數百千萬歲,其水漸長至遍淨天。有四大風持此水住:住風、持風、不動、堅固。其後水稍減,四面有大風名「僧伽」,吹水令動,鼓蕩濤波,起沫積聚,風吹離水,在虛空中自然堅固,變成天宮——先成光音天宮(七寶校飾),次成梵迦夷天宮,「如是乃至海水一味鹹苦,亦如火災復時」。經文以「亦如火災復時」一句省略後續諸天宮及山海形成之細節,表示水災還復的次第與火災還復相同。

術語方面:本經一律用「水災」,與「火災」「風災」並稱,不用「水劫」之名;「劫」字在本經另指刀兵劫、飢餓劫、疾疫劫等小三災,與大三災(火、水、風)分屬不同層級。 壞後重建稱「還復」,經末總結為「是為三災,是為三復」。 本經以「遍淨天」為水災上際,此天名在別譯中或作「遍淨」,本經固定用三字全稱。

整體而言,《長阿含經》對水災的論述結構為:時間框架(四事長久)→ 三災與三際 → 起因(眾生修第三禪上生)→ 正壞(大水消盡一切,地下水盡、水下風盡)→ 法義(諸行無常)→ 還復(黑雲降雨、四風持水、僧伽風成天宮)。敘事以佛告比丘的口吻展開,反覆以「誰當信者?獨有見者,乃能知耳」強調此境非凡夫所能信受,唯親見者方知。

阿毘達磨俱舍論T1558 · 毘曇部

《阿毘達磨俱舍論》於壞劫論中,將世界之毀壞歸為三災——火、水、風,水災居其中。論以頌總攝:「三災火水風,上三定為頂,如次內災等,四無不動故,然彼器非常,情俱生滅故,要七火一水,七水火後風。」 此頌標明三災各以色界上三靜慮為其災頂,並揭示災次規律:七次火災之後方有一次水災,七次水災之後方有一次風災。

關於水災之破壞範圍,論明言:「第三靜慮為水災頂,此下為水所浸爛故。」 即水災所及,自下地乃至第三靜慮以下一切器世間皆為水所浸爛;第三靜慮本身則為水災之頂限,不為水所壞。論又釋「災頂」之義:「隨何災上,名彼災頂。」 災頂即該災所能到達之最上界地。

論以「內災等彼」解釋下三定何以各遭外災。就水災而言:「第二靜慮喜受為內災,與輕安俱潤,身如水故,遍身麁重由此皆除故,經說苦根第二靜慮滅。」 第二靜慮之喜受與輕安俱起,潤澤全身猶如水之浸潤,故與外水災相應。論總結其理:「若入此靜慮,有如是內災,生此靜慮時,遭是外災壞。」 內災與外災一一相配,初定尋伺配火,二定喜受配水,三定動息配風。

第四靜慮則無任何外災能壞,論云:「彼無外災,離內災故。由此佛說彼名不動,內外三災所不及故。」 水災既以第三靜慮為頂,第四靜慮自非水災所及。

論又設問「何緣不立地亦為災」,答以「器世間即是地故,但可火等與地相違,不可說言地還違地」,故災唯火水風三,不立地災。水災之體性即為能浸爛器世間之大水,與火之焚燒、風之飄散並列為三種壞器之相。

於壞劫總相中,論先廣說火災焚燒世界之過程——七日輪現、諸海乾竭、洲渚三輪並從焚燎、風吹猛焰燒上天宮乃至梵宮——而後以「餘災亦爾,如應當知」一句攝水、風二災,意謂水災壞世之次第大體同火災之漸次而上,唯所壞之頂限與能壞之體性有異。其後更以「前說火災焚燒世界,餘災亦爾,如應當知。何者為餘?今當具辯」 正式引入三災分別之論。

術語方面,本論一律用「水災」之名,與火災、風災並稱「三災」;以「災頂」標示各災所至之最高界地;以「內災」「外災」對舉,說明定中煩惱與器世間災變之對應;以「浸爛」專狀水災壞物之相,有別於火之「焚燒」、風之「飄散」;又以「不動」稱第四靜慮,謂三災所不能及。

瑜伽師地論T1579 · 瑜伽部

《瑜伽師地論》論水災,置於壞劫三災(火、水、風)之次第中,文簡而義核。其核心表述為:「過七火災已,於第二靜慮中,有俱生水界起,壞器世間,如水消鹽。此之水界與器世間一時俱沒。如是沒已,復二十中劫住。」 即水災之起,須俟七番火災之後;水之體性為「俱生水界」,從第二靜慮天中俱然而起,非由外至;其壞世之相,喻如「水消鹽」——器世間非被沖決破碎,乃如鹽入水般消融無跡;能壞之水界與所壞之器世間「一時俱沒」,同歸於盡。

本論用語有數處可記。其一,稱色界諸定為「靜慮」——初靜慮、第二靜慮、第三靜慮——而不作「禪定」或「禪」,此為玄奘譯場之固定譯法。火災極至梵世(初靜慮所攝),水災起於第二靜慮,風災起於第三靜慮,三災所依之定境逐層遞上。其二,稱物質世界為「器世間」,與「有情世間」對舉;壞劫先明有情世間壞(五趣有情漸次上生、無一可得),後明器世間壞。其三,水災之體稱「水界」,與「火界」「風界」並列,取四大種之「界」義,強調其為法爾俱起之元素力,非尋常洪水。

三災之數量節次,論有明文:七火災而一水災,七水災而復七火災、再一風災,「從此無間」而風界起。每次大災壞世之後,皆接「復二十中劫住」之空無期。火災之壞,論以「六種所燒事」細分其漸次:第二日輪枯竭小大溝坑,第三日輪枯竭小河大河,第四日輪枯竭無熱大池,第五日輪及第六一分枯竭大海,第六一分及第七日輪燒然蘇迷盧山及大地;火焰為風所鼓,展轉熾盛,極至梵世。論末更將所壞略攝為三事:水所生事(藥草等)由初日所槁,水事由五日所涸,恒相續住體堅實事由二日所燒。水災之敘事即緊接此火災細說之後,以「云何水災?」一句轉入。

水災之說復嵌於成壞大循環中。論先明住劫中壽量一減一增及儉、病、刀三小災,次明住劫盡後有情展轉上生極淨光天、器世間為火所壞,再明水災、風災。壞後非永滅:過二十中劫,由一切有情業增上力,世間復成,從第三靜慮器世間漸次下成,欲界宮殿如化而出,大風輪持水、金藏雲降雨、鼓水令堅而成金性地輪。水災雖極壞器世間,仍不出業感成壞之循環。

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