The harder I work, the more I live.

You can't use up creativity. The more you use, the more you have.

A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.

儿童的进步不是取决于年龄，而是取决于能够自由地观看他周围的一切。

远水救火是难办到的，再好的亲戚也不如近处的邻居。

过去无法改变，但未来可以。现在如何生活，将塑造未来。