This is an idiom that refers to being proud. Alternate translation: "you are very proud of what you have done" (See: [[rc://en/ta/man/translate/figs-idiom]])
Jehoash uses this question to warn Amaziah not to attack him. Alternate translation: "for you should not cause trouble for yourself and suffer defeat" (See: [[rc://en/ta/man/translate/figs-rquestion]])