Bhagavad Gita, Chapter 2 verse 58: And when he withdraws his senses from their objects, as a tortoise withdraws limbs into his shell, his intellect is established.
Through the senses, desires drag the mind out into the attractive (and aversive) qualities found in objects of the senses (2.55, 2.56). The 'intellect established' in desireless Self (2.57) frees the mind from desires and consequently, the sense's grasp on objects. 'He withdraws his senses from their objects, as a tortoise withdraws limbs into his shell.'
copyright Keith R Parker 2021