The best books... are those that tell you what you know already.

Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend.

"There's nothing that says you have to be happy all the time."

Mathematics is the key to unlocking the secrets of the universe and understanding the fundamental laws that govern it.

爱是永恒的宽恕行为，是化作习惯的温柔凝视。