成功不要紧，失败不致命。继续前行的勇气，才最可贵。

Failure is instructive. The person who really thinks learns quite as much from his failures as from his successes.

让自我高兴起来的最好办法就是设法让别人高兴起来。

你知道得越多，就越意识到自己知道得多么少。