What This Concept Is About
In the Buddhist path of liberation, 空 (śūnyatā, "emptiness") is the sharp wisdom that dismantles 我执 (ātma-grāha, attachment to self) and 法执 (dharma-grāha, attachment to dharmas), severing the very root of suffering. Yet the human mind has an extremely stubborn habit—it habitually re-chews every medicinal "antidote," swallows it down again, and lets it congeal into a new "poison."
When a person, through cultivating 内空 (adhyātma-śūnyatā, "inner emptiness"—contemplating the selflessness of one's own body and mind) and 外空 (bahirdhā-śūnyatā, "outer emptiness"—contemplating the selflessness of external phenomena), finally sees through worldly fame, profit, fixations, and obsessions, and tastes the vast, translucent openness of "all dharmas are empty," an extremely subtle and lethal danger quietly begins to brew: he begins to cling to this "emptiness" itself.
He turns "emptiness" into a higher-order truth, a solid foothold, a sense of security—even a "safe shelter" in which to hide from worldly vexations. At this point, "emptiness" is no longer a tool of liberation but another lock. In Buddhist terms, this is called 空见 (śūnyatā-dṛṣṭi, "the view of emptiness") or 恶取空 (dur-gṛhītā śūnyatā, "wrongly grasped emptiness").
To thoroughly sweep away this subtle clinging to "emptiness," the profoundly liberative concept of 空空 (śūnyatā-śūnyatā, "emptiness of emptiness") arises. It is one of the most essential and most exquisitely logical breakthrough points among the 十八空 (aṣṭādaśa-śūnyatāḥ, "the eighteen emptinesses") of Mahāyāna Buddhism.
1. The Classic Definition: All Dharmas Are Empty; This Emptiness Is Also Empty
* **《摩诃般若波罗蜜经》(*Mahāprajñāpāramitā-sūtra*)** offers an extremely crisp classic definition: > "何等为空空？一切法空，是空亦空，非常非灭故。何以故？性自尔。是名空空。" *"What is the emptiness of emptiness? All dharmas are empty; this emptiness is also empty, because it is neither eternal nor annihilated. Why? Because its nature is naturally so. This is called the emptiness of emptiness."* That is to say: all methods and phenomena of both the mundane and supramundane worlds (一切法, all dharmas) lack any independent, eternal self-nature (一切法空, "all dharmas are empty"); and the state or concept of "emptiness" used to dismantle these myriad dharmas is itself equally without self-nature and unclinging (是空亦空, "this emptiness is also empty"). It is neither an eternal, unchanging entity (非常, "not eternal") nor total annihilation and nothingness (非灭, "not extinct"). Why? Because the original nature of all dharmas is spontaneously so (性自尔, "the nature is naturally so").
* **《大方等大集经》(*Mahāvaipulya-mahāsaṃnipāta-sūtra*)** supplements the definition from another angle: > "空者，一切诸法空。以彼空故空，非积聚不可坏不可取。何以故？诸法性尔。是名空空。" *"Emptiness: all dharmas are empty. It is empty by virtue of that emptiness; it is not an accumulation, cannot be destroyed, cannot be grasped. Why? Because the nature of dharmas is so. This is called the emptiness of emptiness."* The sūtra states explicitly that "emptiness" itself is by no means an accumulation (非积聚) of any material or mental entity; it is not a "solid object" that can be established, and therefore there is nothing to be destroyed (不可坏), and it absolutely cannot be seized by consciousness and claimed as one's own (不可取).
2. Its Place in the Path of Liberation and Contemplative Practice
In the coordinate system of the entire liberative path, "emptiness of emptiness" is the breakwater that prevents practitioners from "sinking into the experience of liberation midway."
If "emptiness" is a broom that sweeps away clinging to all things, then "emptiness of emptiness" is throwing the broom itself into the fire once the sweeping is done. If the broom is not burned, it becomes the biggest obstacle in the room.
In actual contemplative practice, the scriptures describe an extremely refined state of "non-seeing" and "non-attainability": * The various emptinesses do not see one another (诸空不相见): In the *Mahāprajñāpāramitā-sūtra*, when the bodhisattva contemplates "inner and outer emptiness," he does not see "emptiness of emptiness" within it; and in "emptiness of emptiness," he does not see "inner and outer emptiness" or "great emptiness." This "non-seeing" is by no means blindness; it indicates that among the various emptiness-aspects there is no subject–object opposition, no stacking of higher and lower levels—thereby preventing "emptiness" from being fashioned into yet another ladder or entity. * Within emptiness, emptiness itself is also unattainable (空中空亦不可得): The sūtra says, 空中空亦不可得，何况空中过去色可得 ("Within emptiness, emptiness is also unattainable; how much less can past form be attained within emptiness?"). In the ultimate experience of emptiness, even the concept of "emptiness" cannot be located—how much less the mundane dharmas of past, present, and future form, feeling, perception, volition, and consciousness (五蕴, pañcaskandha, "the five aggregates")? This is what is meant by "unattainable because unattainable" (不可得故不可得). * Emptiness is also signless and inexpressible (空亦无相与不可言说): The *Mahāvaipulya-mahāsaṃnipāta-sūtra* emphasizes that 空相为相，空亦无相 ("the sign of emptiness is the sign; emptiness is also without signs"). Although the Buddha proclaimed "emptiness" in order to guide sentient beings, 佛虽说空，终已无说，空性叵说，是故名空 ("though the Buddha speaks of emptiness, in the end there is nothing spoken; the nature of emptiness cannot be spoken, therefore it is called emptiness"). All words and conceptual signs—including the word "emptiness" itself—are merely provisional designations (假名, prajñapti, "provisional name"), like space, which has no shape or form.
A Walkthrough in Daily Life
We need not retreat to a mountain meditation hall. In the everyday lives of contemporary people, the logical progression and the pitfalls of "emptiness of emptiness" play out almost every day.
Let us borrow the experience of "Mr. Zhang" (张先生), a modern white-collar worker, in his workplace and psychological struggles, to conduct a rigorous walkthrough of "emptiness of emptiness":
``` [Stage 1: Worldly clinging] ───(setback / seeing through)───> [Stage 2: Falling into the "view of emptiness"] ───(practicing "emptiness of emptiness")───> [Stage 3: Ultimate liberation] (clinging to KPIs, mortgage, recognition) (using "emptiness" as a refuge, cold pseudo-detachment) (not falling to either extreme, living actively without mental obstruction) ```
Step One: Worldly Clinging (All Dharmas as Truly Real)
Mr. Zhang works overtime every day to meet project deadlines, agonizes over KPIs, loses sleep over a single remark from his boss, and treats his professional status and bank balance as the absolutely real foundation of his life. At this point, he is in a state of "clinging to existence" (有执), regarding the mundane phenomena of form, feeling, perception, volition, and consciousness as eternal, substantial things.
Step Two: Initial Experience of "Emptiness" (All Dharmas Are Empty)
After a serious layoff crisis or a major illness, Mr. Zhang begins to encounter Buddhism or philosophy, and he has an awakening: the company, the position, fame and profit, even this physical body (色蕴, rūpa-skandha, "the form aggregate")—all are products of causes and conditions, vanishing in an instant. "A promotion and a raise are empty; anxiety is empty; even this office is empty." In that moment, he experiences "all dharmas are empty." He feels a lightness he has never known; the burden is lifted.
Step Three: Falling into Subtle Clinging (Taking "Emptiness" as Real / Clinging to Emptiness)
But immediately, Mr. Zhang steps into the trap that most people stumble into—he turns "emptiness" into a new faith or a refuge: * At a department meeting to discuss a new business initiative, he spreads his hands: "Everything is empty anyway—what's the point of doing any of this?" (mistaking emptiness for nihilism / annihilation) * Facing his wife's emotional communication, he says coldly: "Clinging to feelings just means you haven't seen through enough; a mind without obstruction—that is emptiness." (turning "emptiness" into a cold defense mechanism) * He indulges in the moral superiority of "I have already seen through everything; you are all still struggling in the mundane world" (solidifying "emptiness" into a rigid entity and a source of superiority—grasping what is "ungraspable").
At this point, although Mr. Zhang chants "all dharmas are empty," he has in fact merely replaced "clinging to fame and profit" with "clinging to the concept of emptiness." He has been tripped by the very broom called "emptiness."
Step Four: Practicing "Emptiness of Emptiness" (This Emptiness Is Also Empty)
If Mr. Zhang goes on to contemplate "emptiness of emptiness," what he needs to sweep away is precisely this "emptiness" itself: 1. "Emptiness" is not a refuge: "Emptiness" is not a substantial space you can hide in to avoid work and responsibility (*非积聚不可坏不可取, not an accumulation, indestructible, ungraspable*). 2. Neither eternal nor annihilated; the nature is naturally so (非常非灭，性自尔): When things succeed, that is causes and conditions; when things fail, that too is causes and conditions. The "emptiness-nature" within all of this is simply the underlying logic of all things (*性自尔, the nature is naturally so*)—it does not require you to deliberately maintain a pose of "emptiness." 3. Within emptiness, emptiness is also unattainable (空中空亦不可得): When you stop reciting "I am empty" or "this matter is empty," and let go even of the concept of "emptiness," you will no longer use "coldness" to perform "transcendence." 4. Return to life, unmoved within emptiness (于空不动): At this point, Mr. Zhang returns to the workplace. When it is time to write a PPT, he writes it; when it is time to care for his family, he cares for them. He engages problems actively, but his mind is no longer held hostage by success or failure—because he clings neither to the worldly "existence" nor to the supramundane "emptiness."
This is what "emptiness of emptiness" actually looks like in daily life: it does not ask you to flee reality; it sweeps away even the thought of "fleeing," so that you can truly live freely in the present moment.
Why Contemporary People Need It
The spiritual predicament of contemporary people often comes not only from "being unable to let go," but even more from "the secondary distortion that follows pretending to let go."
1. Deconstructing Contemporary "Buddha-like Indifference" and "Spiritual Surrender"
Contemporary society is saturated with uncertainty; moods like 佛系 ("Buddha-like indifference"), 躺平 ("lying flat"), and "the rat race is meaningless" spread widely. Many people use "everything is empty" as a shield for escaping real-world pressure and avoiding interpersonal responsibility. This "surrender-style Buddhism" is, in Buddhist terms, by no means emptiness—it is 断灭见 (uccheda-dṛṣṭi, "the view of annihilation"—the belief that nothing has meaning) or 恶取空 (wrongly grasped emptiness).
"Emptiness of emptiness" is an extremely potent sobering agent. It tells you: "Emptiness" is absolutely not a "great pit of nothingness" to lie down in. Emptiness itself is also empty. Although all dharmas lack self-nature, the laws of causes, conditions, and results operate with precise fidelity at the conventional level. Using "emptiness" to escape reality is merely numbing yourself with a new label. "Emptiness of emptiness" thoroughly strips away the contemporary excuse for disguising "passive world-weariness" as "profound wisdom."
2. Contrast with Contemporary Experience: Algorithmic Life and the Limits of Neuroscience
* In contrast with "algorithmic life": In the age of algorithms, the information we scroll past on social media, the personas we construct, and even the "self-identity" shaped by personalized recommendations are all "illusory appearances" that can be easily deconstructed. Many people see through the tedium of trending topics and fall into extreme nihilism (having deconstructed everything). But if one stops there, one sinks into nihilism. The logic of "emptiness of emptiness" is: the illusoriness of algorithms (法空, "dharmas are empty") must indeed be seen through, but the smug sense of detached spectatorship that follows "seeing through the algorithms"—that "emptiness"—must also be swept away (空空), so that one can rebuild genuine, warm human connections. * In contrast with "neuroscience / AI": Contemporary brain science and neuroscience have found that the human "sense of self" is merely a physiological illusion produced by the coordinated activity of multiple brain regions (roughly analogous to "person emptiness / sentient beings unattainable"); generative AI likewise demonstrates that many thought-constructions once considered sacred are merely products of neural networks or matrix computation (roughly analogous to 法空, "dharmas are empty"). * The limit of science: Neuroscience can tell us at the material level that "the self and cognition are constructed (empty)," but science itself is often unable to resolve the ensuing "crisis of meaninglessness"—when humans discover that they are merely machines of genes and electrical signals, where does life go? Science tends to stop at deconstruction, but cannot confer on the mind the capacity for abiding peace. * What "emptiness of emptiness" surpasses: "Emptiness of emptiness" deconstructs not only the "self," but goes further to deconstruct "nihilism itself." It states plainly: deconstruction (emptiness) is not the endpoint; "within emptiness, emptiness is also unattainable" (空中空亦不可得). Buddhism does not stop at negation; when negation is complete, even the trace of "negation" is erased. Thus the mind is without obstruction, and one becomes 堪能安置一切众生于三乘无为界 ("capable of establishing all sentient beings in the unconditioned realm of the three vehicles")—realizing the leap from "cold materialist deconstruction" to "unconditioned compassion."
3. Gaining "Uninjurable" Psychological Resilience
The *Mahāvaipulya-mahāsaṃnipāta-sūtra* contains a beautiful simile: "A practitioner of the emptiness contemplation is likewise incapable of being harmed—just as rain, spears, and arrows cannot harm space."
If your mind is a hard target (clinging to reputation, status, even to your own "loftiness"), then external criticism, setbacks, and slander—the rain, spears, and arrows—will strike you precisely and cause you immense suffering. If you practice "emptiness" and dissolve the target into space, the arrows pass straight through. But if you cling to "I am space" (clinging to the sign of emptiness), you have still constructed a target called "space." Only by practicing "emptiness of emptiness," when even the concept of "space" no longer exists, does your mind truly reach the state of 无相 (animitta, "signless"), 不可坏 ("indestructible"), and 不可取 ("ungraspable"). At that point, the winds and rains of the external world are merely winds and rains; there is nothing left that can harm you.
Common Misreadings and Clarifications
To fully grasp "emptiness of emptiness," we must clarify the conceptual boundaries that laypeople and even beginners most easily confuse:
| Common Misreading | Core Error of the Misreading | The Classic Clarification from "Emptiness of Emptiness" | | :--- | :--- | :--- | | Misreading 1: "Emptiness of emptiness" means "absolute nothingness" (nihilism) | Understanding "emptiness" as physical vacuum or the annihilation/destruction of things (the view of annihilation). | 非常非灭，性自尔 (neither eternal nor annihilated; the nature is naturally so). The *Mahāprajñāpāramitā-sūtra* states that emptiness-nature is neither an eternal entity nor total annihilation. All dharmas continue through causes and conditions; phenomena remain vividly present, but within them there is no independent, eternal "self-nature." | | Misreading 2: "Emptiness of emptiness" is "stacked emptiness"—emptiness upon emptiness, getting emptier and emptier | Understanding "emptiness of emptiness" as a mathematical double negative, or as an ever-higher ladder of stages. | 非积聚，诸空不相见 (not an accumulation; the various emptinesses do not see one another). "Emptiness of emptiness" is not a stacking of concepts but the self-dissolution of the concept of "emptiness" itself (自空, "self-empty"). When the bodhisattva contemplates, "in emptiness of emptiness he does not see inner and outer emptiness; in inner and outer emptiness he does not see emptiness of emptiness"—there is no hierarchy or opposition whatsoever. | | Misreading 3: After seeing through the mundane world, hide in "emptiness" and ignore the world's suffering | Treating "emptiness" as a refuge from worldly responsibility, falling into the subtle dharma-clinging of self-serving detachment. | 于空不动，拔济众生 (unmoved within emptiness, rescuing sentient beings). The *Mahāvaipulya-mahāsaṃnipāta-sūtra* states explicitly that the merit of practicing emptiness of emptiness is 堪能安置一切众生于三乘无为界 ("being capable of establishing all sentient beings in the unconditioned realm of the three vehicles"). One who truly realizes emptiness of emptiness, free of both self-clinging and dharma-clinging, is precisely able to arouse 无缘大慈 ("great compassion without conditions") and 同体大悲 ("great pity of one substance with all beings"), actively rescuing sentient beings without falling into any clinging. | | Misreading 4: Since "emptiness is also empty," one need not practice the emptiness contemplation at all | Thinking that since emptiness is also empty, one need not cultivate emptiness from the start and may simply continue clinging to the mundane. | 借梯登楼，过河拆桥 (borrow the ladder to climb the building; dismantle the bridge after crossing the river). As the *Mahāvaipulya-mahāsaṃnipāta-sūtra* says, 佛虽说空，终已无说 ("though the Buddha speaks of emptiness, in the end there is nothing spoken"). Without the earlier stage of "all dharmas are empty" (dismantling worldly clinging), speaking directly of "emptiness of emptiness" is mere lip service. One must first take the medicine (emptiness) to cure the disease (clinging), and only after the illness is cured put the medicine down—not refuse the medicine from the very beginning. |
Conclusion
"Emptiness of emptiness" is the most subversive and the most thoroughgoing checkpoint in the prajñā wisdom of Mahāyāna Buddhism.
It reminds every practitioner: the endpoint of liberation is not jumping out of a worldly cage and climbing into a fancier cage called "meditative concentration" or "emptiness-nature"; it is tearing down all cages—including the one called "liberation" itself.
When "all dharmas are empty" sweeps clean the dust of the world, and "emptiness is also empty" burns the broom that swept the dust, the mind truly recovers its boundless, limitless freedom. At that point, tea is still tea, rice is still rice, life is still life—and you soar freely in an unobstructed sky.