己

己(おのれ)が誰なのか知れ。

Know who you are.

己(おのれ)も生き他(ほか)も生かせ。

Live and let live.

賢者は己(おのれ)の失策から学ぶ。

A wise man profits from his mistakes.

己(おのれ)をもって他人を律するな。

Don't judge others by yourself.

己(おのれ)を知ることは容易ではない。

To know oneself is not easy.