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A good world needs knowledge， kindliness， and courage； it does not need a regretful hankering after the past or a fettering of the free intelligence by the words uttered long ago by ignorant men.

A poet must be like a tree, rooted in his native soil, drawing nourishment from it to bear fruit.

在數學中，真理存在于我們尚未知曉的某處，而我們唯一能希望找到它的方法就是探索。

看待事的可貴處在于明理，處事的可貴處在于內心公平。