Don’t be afraid to fail, be afraid not to try.

君子有三种事应该加以警戒：年轻的时候，血气还没有固定，力戒贪恋女色；到了壮年时期，血气正旺盛，力戒逞强好斗；到了老年时期，血气已经衰弱，力戒贪得无厌。

Your most unhappy customers are your greatest source of learning.

I don’t fear anyone, but I respect everyone.

"I think that the only way to deal with life is to find something that you love and do it with all your heart."

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.

【译文】下等君主用自己能力，中等君主用他人劳力，上等君主用他人智慧。