You have to believe in yourself when no one else does.

说真话的最大好处是你不需要记住你说了什么。

Psychology should be the science of mental life, both of its phenomena and of their conditions.

Computer programming is an art, because it applies accumulated knowledge to the world, because it requires skill and ingenuity, and especially because it produces objects of beauty.

Making something variable is easy. Controlling duration of constancy is the trick.