To feel that one has done the right thing.
自分が正しいことをしたと感じる。 (Jibun ga tadashī koto o shita to kanjiru.)
"After returning the lost wallet, he went to bed with a clear conscience."
"失くした財布を返した後、彼は清い心で床に就いた。" (Nakushita saifu o kaeshita ato, kare wa kiyoi kokoro de toko ni tsuita.)
to be very worried and not know what to do next
to collect things together
to admit your mistake and apologize
To continue believing in a positive outcome.
to stop something before it becomes a bigger problem
to be giving testimony in court