Verse 63

अतत्त्वज्ञमविश्रान्तमलब्धात्मानमस्थितम् ।निगिरन्तीन्द्रियाण्याशु हरिणा इव पल्लवम्

In plain words

One who does not know Truth, unresting, who has not attained the ātman, unsettled — the senses swiftly swallow him, as deer devour a tender shoot.