The works of Ādi Śaṅkarācārya

Praśnottararatnamālikā

Verse 11

किं जीवितमनवद्यं किं जाड्यं पाठतोऽप्यनभ्यासः ।को जागर्ति विवेकी को निद्रा मूढता जन्तोः ॥ १० ॥

In plain words

What counts as a life? One with nothing in it to be ashamed of. What is stupidity? Reading the text and never practicing it. Who is awake? The one who can tell the real from the unreal. What is sleep? The delusion a living being lives in.

Close to the Sanskrit

What is life? The blameless one. What is dullness? Non-practice, even after study. Who is awake? The one who discriminates. What is sleep? The delusion of a creature.