解释：本治则国家巩固，本乱则国家危亡。

You have to believe in yourself when no one else does – that makes you a winner right there.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

Changing the destructive things you say to yourself when you experience the setbacks that life deals all of us is the central skill of optimism.

教育是在所学知识被遗忘后仍能留存的东西。