इति गुह्यतमं शास्त्रमिदमुक्तं मयाऽनघ।एतद्बुद्ध्वा बुद्धिमान्स्यात्कृतकृत्यश्च भारत॥
iti guhyatamaṃ śāstram idam uktaṃ mayānaghaetad buddhvā buddhimān syāt kṛta-kṛtyaś ca bhārata
Word by word
The verse says
So the most secret teaching has been spoken by me, faultless one. Understanding it, a person becomes wise, and has done what he came to do, Arjuna.
In plain words
He signs off, and there is a promise folded into the sign-off.
Kṛta-kṛtya - one who has done what was to be done. Finished. Not busy, not still owing.
And he calls Arjuna anagha, faultless, which is a generous thing to call a man who has spent the whole book listing what is wrong with him.
Where you've felt this · in failure
Priya spends two years of her degree sure that she is behind. Behind the others, behind where she should be, behind a schedule nobody ever showed her. Then she passes, and for about a week she notices something she had forgotten existed: there is nothing she is supposed to be doing right now. The strange part is not the passing. It is finding out that the feeling of owing was never attached to anything real.
Going deeper
Being finished is a real state, and almost nobody believes in it, which is why this ending is more than a formality.
Kṛta-kṛtya means having done what was to be done. It describes a person who is not owing. Most of us run a quiet ledger - things not yet achieved, people not yet impressed, a version of ourselves not yet arrived at. The ledger never balances, because clearing one entry only makes room for the next.
The claim is that understanding this one thing closes the ledger. Not by finishing the tasks. By showing that the account was opened on a mistake about who you are.
And Krishna calls Arjuna faultless while Arjuna is still mid-collapse, still refusing to fight, still nowhere near the end of his trouble. That is worth keeping hold of. The name is not a reward for arriving. It is a description of what he already was, underneath the state he was in.