to have nothing to feel ashamed of before God or heaven; to have a clear conscience regarding one's actions. Often paired with [[俯不怍于人|俯不怍於人|fu3 bu4 zuo4 yu2 ren2]] to describe a person of complete integrity.

(idiom) to act in a just and honorable way without feeling any shame; upright and aboveboard; to feel neither ashamed before heaven nor embarrassed before others

to behave with integrity even when unobserved; to have a clear conscience even in the privacy of one's own room

To be honest and upright even in private; literally, to have nothing to be ashamed of even in the darkest corner of one's room.

(idiom) not ashamed to ask questions or learn from those in a lower position

to have a clear conscience; to feel no shame before heaven or fellow man