There is no point in worrying about past mistakes.
過去の過ちについて悩む意味はありません。 (kako no ayamachi ni tsuite nayamu imi wa arimasen.)
"We can’t change the past, so what’s done is done."
"私たちは過去を変えることができません、だから済んだことは済んだことです。" (watashitachi wa kako o kaeru koto ga dekimasen, dakara **sunda koto wa sunda koto** desu.)
To face the consequences of one’s actions or decisions.
to perform or express emotions through actions
to make an enormous effort
see the positive side of something
to continue hoping even when it seems impossible
to get angry easily