Bhagavad Gita · Chapter 13: The Field and the Knower of the Field

Bhagavad Gita 13.31

anāditvānnirguṇatvātparamātmāyamavyayaḥ | śarīrastho'pi kaunteya na karoti na lipyate ||

Because it has no beginning and is free of the qualities, this imperishable supreme self, though it dwells in the body, Arjuna, neither acts nor is stained.

Modern context

The supreme self, though it lives in the body, neither acts nor is stained. Whatever the body does, whatever the mind thinks, the deepest self remains untouched. This is a profound comfort for anyone weighed down by past mistakes. The self beneath them was never stained. What needs to change is the identification with the actions, not the self itself.