Bhagavad Gita, Chapter 4, Verse 21

Without hope, the body and mind controlled and all possessions relinquished, he does not suffer any evil consequences, by doing mere bodily action.

Letting go of 'this is mine, this is my doing' changes what an action is even capable of leaving behind.

A lot of the weight people carry from their own actions comes from claiming ownership over them. Loosen that grip enough, and the same physical action stops carrying the same consequence.