节制欲念，修养身心，安贫乐道，摒除机巧，都是驱逐病魔的良方。

当你专注于长期愿景并在短期内完美执行时，成功就会到来。

They are not monuments, but footprints. A monument only says, 'At least I got this far,' while a footprint says, 'This is where I was when I moved again.'

I must study politics and war that my sons may have liberty to study mathematics and philosophy.