Deep Sleep as Veiled Non-Discrimination — Shiva Sutra 1.10

Completing the analysis of the three states, this sutra defines sushupti, deep sleep, as aviveka, a condition of non-discrimination or undifferentiated unawareness, specifically identified as maya-saushupta, the sleep produced by the veiling power of Maya. Kshemaraja explains that unlike turya, which is fully luminous, wakeful awareness underlying all states, ordinary deep sleep is characterized by a temporary but genuine loss of discriminative cognition; the individual experiencer momentarily merges into an undifferentiated, unconscious condition in which neither external objects (as in waking) nor internal mental constructs (as in dream) are cognized. This state, while restful and even pleasant in its aftermath, is not liberation, since it is produced by Maya's concealing power (avarana-shakti) rather than by genuine recognition of one's true nature; the individual emerges from sleep with the same habitual sense of limited selfhood intact, having merely rested rather than realized. This precise definition guards against a common misunderstanding in which deep, dreamless sleep might be mistaken for a spiritually advanced or enlightened condition simply because thought and sensory activity have ceased; the sutra clarifies that mere absence of discrimination is not the same as the presence of luminous self-awareness. For the practitioner, this teaching underscores the importance of cultivating conscious awareness that persists even into deep sleep, a practice sometimes called yoga-nidra or turya-sadhana in the wider tantric tradition, wherein the aim is to remain subtly self-aware even as the ordinary discriminative faculties dissolve, thereby transforming sushupti from a condition of unconscious veiling into a direct gateway toward the ever-present Fourth state.