Memory is identity... You are what you have done; what you have done is in your memory; what you remember defines who you are.

Mental processes are the tools by which we build our survival.

Energy and persistence conquer all things.

最好的投资是那些正在建设未来的人。

The best armor of old age is a well-spent life perfecting it.

你唯一应该努力超越的人，是昨天的自己。

生命的秘密就在于远观最佳。