The other samādhi, preceded by the practice of cultivating the cessation of mental content, leaves only latent impressions behind.

Naming Asamprajñāta Without Naming It

Sūtra 1.18 describes, without ever using the word, what later tradition calls asamprajñāta samādhi, the "other" (anya) samādhi contrasted with the four-fold cognitive samādhi just outlined in 1.17. Here the mind no longer rests on any object at all; even the subtle sense of asmitā has been allowed to subside. What remains, Patañjali says, is saṃskāraśeṣa, a state whose only content is the residue of latent impressions, since even the momentary cessation of a mental fluctuation leaves some trace behind for future mental life to draw upon.

Vyāsa's Reading of Virāma-pratyaya

Vyāsa glosses virāma-pratyaya as the cognition or idea of cessation itself, cultivated as an object of practice until fluctuations of mind (vṛtti) grow sparse and finally stop altogether. He is careful to note that this stopping is preceded by sustained abhyāsa, disciplined practice, distinguishing it from mere blankness or dullness (laya), a concern later echoed in discussions of the danger of mistaking tamasic inactivity for genuine cessation of thought. Vācaspati Miśra develops this by explaining that the "practice" in question is itself directed at the highest form of vairāgya, non-attachment, described a few sūtras earlier at 1.15–1.16, since it is precisely detachment from even subtle mental content that permits fluctuations to subside rather than merely to be suppressed by force.

Distinguishing This State From Ordinary Cessation

Commentators are unanimous that saṃskāraśeṣa does not mean an empty or unconscious mind in any ordinary sense. Vijñānabhikṣu stresses that the impressions left behind are what allow the yogin to re-emerge into ordinary cognition afterward, since a person with no saṃskāras at all could form no further mental life; total absence of saṃskāra belongs only to final liberation, kaivalya, not to this intermediate samādhi still described here. Hariharānanda Āraṇya reads the sūtra as marking a genuinely different order of samādhi from the object-supported forms of 1.17, one without any object (nirālambana) yet not identical with liberation itself, since latent seeds of future mental activity persist within it. Edwin Bryant's commentary situates 1.18 as introducing the crucial distinction, developed across the whole text, between samādhi that still has cognitive content and samādhi that has none, a distinction on which the entire architecture of Book One depends, since 1.19–1.22 go on to specify who attains this cessation and by what varying degrees of effort, before Book Four returns to the question of what finally becomes of these residual impressions. James Haughton Woods, in his early English translation, similarly underscores that the residual saṃskāras named here explain how a yogin resumes ordinary mental life without contradiction after such absorption.

An Advanced, Not Beginner's, Description

This sūtra describes an outcome reached only after sustained practice of the kind described in 1.12–1.16, and classical commentators treat it as far beyond ordinary sitting practice rather than a technique to attempt directly from the start.

Guarding Against Premature Blankness

Vyāsa's warning against confusing genuine cessation with dullness matters practically: a mind that goes vacant through fatigue or drowsiness is not exhibiting virāma-pratyaya, since that requires prior, sustained, deliberate practice, not passive slipping into inertia during a tired sitting.

A Cautious Practical Framework

1. Build a stable base through the practice and detachment described in the sūtras that precede this one, rather than seeking cessation directly.
2. Notice the difference between an alert, quiet mind and a merely foggy or sleepy one during sitting.
3. Treat any experience of unusual stillness as information to observe carefully, not as an achievement to claim aloud.
4. Recognize that ordinary thought will return, carrying whatever latent impressions were present, and receive that return without disappointment or alarm.
5. Discuss unusual states with an experienced teacher rather than assuming self-diagnosis of "asamprajñāta samādhi" alone.

Read this way, 1.18 functions as a marker further along the path than most practitioners will verify in themselves, useful chiefly for orienting where sustained abhyāsa and vairāgya are ultimately meant to lead a serious, long-term practitioner over years of steady work. This gradual framing also discourages a student from chasing stillness as a trophy, keeping attention on steady, cumulative practice instead.

A common misreading treats saṃskāraśeṣa as describing simple unconsciousness or sleep, since "only impressions remain" sounds like a mind gone dark and inert. Vyāsa explicitly distinguishes this cultivated cessation from tamasic dullness; the state described requires prior sustained practice and alert non-attachment, not fatigue or drowsiness overtaking a tired meditator. A second misreading conflates this sūtra's "other samādhi" with final liberation, kaivalya, described only much later in Book Four of the text. Vijñānabhikṣu is explicit that saṃskāraśeṣa still carries latent seeds capable of producing further mental activity, so the person emerging from this state resumes ordinary experience, unlike the liberated puruṣa who has no further engagement with prakṛti's productions at all. A third error assumes virāma-pratyaya names a single technique separate from everything already taught, when Vācaspati Miśra reads it as continuous with the highest vairāgya of 1.15–1.16, applied with such persistence that fluctuations finally cease of themselves. Some modern popular accounts also import Vedāntic language of "pure consciousness" wholesale into this sūtra, obscuring that Patañjali's own Sāṅkhya-based vocabulary speaks in terms of vṛtti-cessation and saṃskāra, not a metaphysical merging with Brahman as such. Reading 1.18 within the terms Vyāsa and Vācaspati Miśra actually supply keeps its claims modest: a describable, cultivated, objectless samādhi still short of the liberation discussed in Book Four. Recognizing this ends the tendency to treat one deep sitting as final proof of accomplished yoga.