你必须是自己幸福的最好判断者。

The battle of life is already half won by the young man who is brought personally in contact with high officials; and the great aim of every boy should be to do something beyond the sphere of his duties--something which attracts the attention of those who over him.

The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.

一种新的科学真理并不是通过说服其对手并让他们看到光明而取得胜利，而是因为其对手最终死去，一个熟悉它的新一代人成长起来。