Yoga Sutra 1.10 the mental process which rests on the notion of non-existence is sleep
Sūtra I.10 The mental process which rests on the notion of non-existence is sleep This is a special notion arising from the recollection on waking in the form of ‘I slept well; my mind is calm and has cleared up my understanding’, or else ‘I slept badly, my mind is dull and wanders aimlessly’ or…