[live and let live] To live in the way you prefer and let others live as they wish without being bothered by you.
* /Father scolds Mother because she wears her hair in curlers and Mother scolds Father because he smokes a smelly pipe. Grandfather says it's her hair and his pipe; live and let live./
Compare: GIVE AND TAKE(1), LET BYGONES BE BYGONES, FORGIVE AND FORGET.