最难的是理解已经知道的东西。

要理解他人，必须先理解自己。

If you don’t take risks, you’ll never know what you’re truly capable of.

Democracy is the only system that can reflect the human spirit's indomitable will to be free.

This is the best time ever to make something. None of the greatest， coolest creations 20 years from now have been invented yet. You are not late.

Psychology should study how the mind works, not just what it contains.