"The key to success is to focus our conscious mind on things we desire, not things we fear."

A good mathematician is one who can see analogies between theorems; a great mathematician is one who can see analogies between analogies.

Remember, if you ever need a helping hand, you'll find them at the end of each of your arms.

透明性不仅是物理特性，更是一种道德立场。

"Memory is the only paradise from which we cannot be expelled."

Books make great gifts because they have whole worlds inside of them.

The heart is a muscle the size of your fist. Keep loving, keep fighting.