But I do not recognize the right to waste them, nor to rob -- by wasteful use -- the generations that come after us."

VOA: special.2010.08.12

If my advice is lost in the wind and you do not do as I wish, I do not recognize you as my son."

如果你辜负了我对你的期望,胆敢把我的话当耳边风,我就绝不认你这个儿子"

耶鲁公开课 - 欧洲文明课程节选

But to do that is I recognize not without dangers often severe dangers of its own.

但一旦这么做，我要坦言，不是没有风险,通常还会是来自其本身的巨大风险。

耶鲁公开课 - 政治哲学导论课程节选