Mandukya Karika, verse 3.29

Text

यथा स्वप्ने द्वयाभासं स्पन्दते मायया मनः ।
तथा जाग्रद्द्वयाभासं स्पन्दते मायया मनः ॥ २९ ॥

yathā svapne dvayābhāsaṃ spandate māyayā manaḥ |
tathā jāgraddvayābhāsaṃ spandate māyayā manaḥ || 29 ||

29. As in dream the mind acts through Māyā presenting the appearance of duality, so also in the waking state the mind acts, through Māyā, presenting the appearance of duality.

Shankara Bhashya (commentary)

How is it possible for the Reality to pass into birth through Māyā? It is thus replied;—As the snake imagined in the rope, is real1 when seen as the rope, so also the mind,2 from the standpoint of the knowledge of the ultimate Reality, is seen to be identical with Ātman. This mind, in dream, appears to us as dual in the forms of the cogniser and the cognised through3 Māyā, as the snake àppears to be separate from the rope through ignorance. Similarly, indeed the mind acts (in a dual form) in the waking state through Māyā. That4 is to say, the mind appears to act,