迷途知返

1.become aware of one's errors and turn back from one's wrong path; able to correct one's own mistake; be aware that one has strayed from (the) right path; be determined to correct mistakes one has made; realize one's errors and mend one's ways; recover [get back] one's bearings and return to the fold; retract from the wrong path; return from the lost way; return to the correct path; stop on the brink of a precipice and turn back from the wrong path