真心

彼は真心を込めて手紙を書いた。

He wrote the letter from the bottom of his heart.

母の真心のこもった手料理に涙が出た。

My mother's lovingly made home cooking brought tears to my eyes.

真心をもって接すれば、相手にもきっと伝わる。

If you treat people with sincerity, they will surely sense it.