Every failure is a lesson that brings you closer to success.

 On the path to truth, only the brave can persist to the end.

幸福源自内心的平静。

The scientist is not a person who gives the right answers, he's one who asks the right questions.

善不是出自内心的，不能保留；行为不能从自身辩明的，不能去做。善不是出自内心的，只能够勉强支撑一时，必然不能长久。所以也只能使伪善。

释义：跟交情浅的朋友说过深的话题，是愚蠢的；生活贫困的人总是希望得到富贵者的施舍，是糊涂的；没有取得他人的信任就进献忠言，会被误解为批评。