Bhagavad Gita · Chapter 15: The Supreme Person
Bhagavad Gita 15.20
इति गुह्यतमं शास्त्रमिदमुक्तं मयानघ ।
एतद्बुद्ध्वा बुद्धिमान्स्यात्कृतकृत्यश्च भारत ॥
iti guhyatamaṃ śāstramidamuktaṃ mayānagha | etadbuddhvā buddhimānsyātkṛtakṛtyaśca bhārata ||
So this most secret teaching has been spoken by me, sinless Arjuna. One who understands it becomes wise, and has done all there is to do.
Modern context
'One who understands this has done all there is to do.' Krtakrtya, one whose work is complete, is a phrase of deep rest. It does not mean the end of activity; it means the end of the restless feeling that something essential is still missing. A person who has understood the heart of things can go on working, but without the anxiety of an unfinished life.