彼は誠心をもって被害者に謝罪した。
He apologized to the victims in all sincerity.
誠心を尽くして説得すれば、きっと相手にも伝わるはずだ。
If you try to persuade them with complete sincerity, it is sure to get through to them.
社長の誠心が通じて、取引先との関係は修復された。
The president's sincerity got through, and relations with the client were repaired.