Bhagavad Gita, Chapter 6, Verse 4

Verily, when there is no attachment, either to sense-objects, or to actions, having renounced all Sankalpas, then is one said to have attained concentration.

Real progress here shows up as a genuine loosening, not just a change in outward behavior.

This gives a concrete marker for the elevated state Krishna just described. Not someone who's stopped acting, but someone whose grip on both sensory pleasure and personal outcome has actually relaxed.