“If the mind becomes inactive in a state of oblivion, awaken it again. If it is distracted, bring it back to the state of tranquillity. In the intermediary state, know the mind containing within it desires in potential form. If the mind has attained to the state of equilibrium, then do not disturb it again.” —Māṇḍūkya Upaniṣad Kārikā 3.44  “When the mind is immersed in oblivion (samādhi or suśupti) then arouse it by means of knowledge and detachment. That is to say, turn the mind to the exercise of discrimination, leading to knowledge of the Self. The word citta in the text means manas or mind. If the mind is distracted by various objects of desire, bring it back to the state of tranquillity. When, by constant practice, the mind is thus awakened from the state of inactivity and also turned back from all objects, but not yet established in equilibrium—when the mind dwells in an intermediary state—then know the mind to be possessed of attachment. It still contains seeds of desires for enjoyment and inactivity. With great care, bring the mind from that state to the realisation of equilibrium. Once the mind has realised the state of equilibrium, or when it is on the way to realise that state, then do not disturb it again. In other words, do not turn it to external objects by attachment.”  — Śaṅkarācārya’s Commentary ơn Māṇḍūkya Upaniṣad Kārikā 3.44