一个没有书籍的世界是一个没有光明的世界。

The most dangerous phrase in the language is, 'We've always done it this way.'

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

最好的领导者是那些倾听多于说话的人。

赏赐并不能让人欢喜,责罚也不能让人畏惧。