Every problem in mathematics is an opportunity to learn something new.
A miner's skill and dedication are just as valuable as the coal they bring to the surface.
The people who are crazy enough to think they can change the world are the ones who do.
Life is too short to waste time hating anyone.
翻译：真正的朋友，顺境时不添虚假繁华，逆境时不改变初心，富贵时不忘记旧交，这样的情谊才珍贵。
If you want to understand function, study structure.