The range of subtlety in meditative objects extends all the way to the undifferentiated (aliṅga), the root nature without any distinguishing mark.

Tracing Subtlety to Its Limit

Sutra 1.45 answers a question the previous sutra left open: if savicāra and nirvicāra samāpatti take subtle objects as their focus, how subtle can such an object become? Patanjali's answer is that the gradation of subtlety extends (paryavasāna, "culminates" or "terminates") all the way to aliṅga, literally "without a mark" or "without a distinguishing sign." Vyasa, working within the Samkhya cosmology that underlies Patanjali's psychology, identifies a graded series running from gross elements, through the tanmātras (subtle sensory essences), through ahaṃkāra and buddhi (the sense of individuality and the discriminative intellect), down to prakriti in its most undifferentiated state, called aliṅga because it displays no distinguishing characteristic by which it could be further differentiated.

Why a Limit Matters

The naming of a terminus is significant because it establishes that yogic absorption on subtle objects is not open-ended or vague; it follows the graded ontology of manifest nature to its very root. Vachaspati Mishra explains aliṅga as the state of prakriti prior to the emergence of the "great principle" (mahat/buddhi), the point at which the three gunas exist in perfect equilibrium and have not yet begun to differentiate into any specific quality or form. Because it has no distinguishing mark, it cannot itself be further divided into subtler categories, which is precisely why Patanjali can use it to mark the outer boundary of the subtle-object series he began describing in sutra 1.44.

Its Function in the Larger Argument

Bryant reads this sutra as clarifying that even the objects of the most refined sabīja (seeded) samādhi remain within the domain of prakriti, however subtle; the meditator absorbed even in contemplation of aliṅga is still absorbed in an object, still within the sabīja category defined in sutra 1.46. Feuerstein notes that this matters philosophically for Patanjali's dualist metaphysics: purusha, pure consciousness, is categorically distinct from even the subtlest reaches of prakriti, so no degree of absorption in prakriti's subtlety, however profound, is itself liberation. Taimni frames aliṅga as the threshold concept that anticipates the shift the text will eventually make toward nirbīja samādhi in sutra 1.51, where absorption is no longer on any object, however subtle, but is entirely free of a supporting seed. Sutra 1.45 thus functions as a kind of horizon marker, showing the practitioner how far the path of object-based absorption can go before a different kind of transition, beyond objects altogether, becomes necessary. Hariharananda Aranya links aliṅga to the Samkhya term mūlaprakṛti, the root cause of manifestation, underscoring that Patanjali's graded series of subtle objects is drawn directly from an existing cosmological map rather than invented freshly for the Yoga Sutras.

Working at the Edge of Subtlety

Sutra 1.45 is primarily a cosmological and structural statement rather than a direct meditation instruction, but it has a practical implication: as concentration deepens and objects of meditation grow subtler, the practitioner should expect the sense of a distinct "object" to become progressively harder to locate, without concluding that anything has gone wrong.

A Short Practice

1. Begin with steady concentration on a gross object for several minutes to establish stability, as in earlier practices.
2. Shift attention inward to the subtlest sense of "I am aware" that can be noticed, without describing or elaborating it in words.
3. Rather than trying to grasp this sense as a thing, simply remain with it, allowing its subtlety to be as it is.
4. If the mind reaches for a concrete image or label to hold onto, gently note this pull and return to the barer, less defined quality of awareness itself.
5. Continue for a few minutes, accepting that the "object" here may feel increasingly indistinct rather than sharper.
6. End the sitting by returning attention to the breath and the body, allowing a natural transition back to ordinary awareness.

Guarding Against Overreach

Because aliṅga marks the outer edge of the entire graded series Patanjali describes, this is not a practice to pursue casually or as an exercise in mere speculation. Vyasa's commentary treats mastery of the coarser stages as prerequisite to any authentic approach to subtler ones, and Swami Vivekananda likewise insisted that genuine progress toward the subtlest objects of concentration comes only after the mind has been well trained through the grosser stages, not by skipping ahead in search of dramatic subtlety. Hariharananda Aranya suggests that most practitioners will find their concentration naturally settling well before reaching anything resembling aliṅga, and he treats this as expected rather than as a shortcoming, since the text presents aliṅga as a theoretical limit rather than a routinely accessible meditative object.

Treating Aliṅga as a State of Personal Attainment

A common misreading imagines aliṅga as an exalted personal experience to be "reached," almost like a meditative trophy. In Vyasa's Samkhya-based reading, aliṅga names a level of prakriti itself, the undifferentiated root-nature, not a special achievement of the meditator's mind. The yogi's absorption may extend to contemplate this level, but aliṅga is a feature of the object side of the equation described back in sutra 1.41, not a title for the meditator's own accomplishment.

Confusing Aliṅga With Purusha or Liberation

Because aliṅga is described as the final, most undifferentiated point of the subtle series, it is sometimes mistaken for purusha, pure consciousness, or for liberation itself. Feuerstein's reading of Patanjali's dualism is clear that aliṅga remains squarely within prakriti, however refined; it is the root of manifest nature, not the seer (purusha) who witnesses nature. Absorption even at this most subtle level is still sabīja, "with seed," as sutra 1.46 goes on to state, and is therefore distinct from the objectless nirbīja samādhi Patanjali reserves for sutra 1.51.

Assuming Every Practitioner Must Reach Aliṅga

A further misreading treats contemplation of aliṅga as a required milestone for every serious practitioner. The commentators present it instead as the outer boundary of a theoretical series describing how far the subtlety of objects in sabīja samādhi can extend, not as a benchmark that ordinary practice is expected to reach or that indicates deficiency in practitioners who do not.