The future belongs to those who understand that doing good is good business.

It is sadder to find the past again and find it inadequate to the present than it is to have it elude you and remain forever a harmonious conception of memory.

I am not interested in solving problems that are already solved.

Mathematics is the language with which God has written the universe.

解释：那些知识浅薄的人所争论的都是些枝微末节。

The poet is a man who plants a tree and then sits in its shade.

The world is full of people who have never, since childhood, met an open doorway with an open mind.

Every setback is a setup for a comeback.