伟人之所以伟大，是因为他立志要成为伟大的人。

 

Suffering is the most powerful teacher of life.

苦难是人生最伟大的老师。

 

The secret of success is constancy to purpose.

成功的秘诀在于对目标的忠实。

 

A man can't ride your back unless it is bent.