君子危うきに近寄らずというから、その話には関わらないでおこう。
As they say, a wise man keeps away from danger, so let's stay out of that business.
君子は豹変すというように、過ちに気づいたらすぐに改めるべきだ。
As the saying goes, the virtuous man changes his ways quickly; once you notice a mistake, you should correct it at once.
彼は誰に対しても礼儀正しく、まさに君子と呼ぶにふさわしい人物だ。
He is courteous to everyone and truly deserves to be called a man of virtue.