A mathematician is a device for turning coffee into theorems.

Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work. And the only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when you find it. And, like any great relationship, it just gets better and better as the years roll on. So keep looking until you find it. Don't settle.

Man can only be free through mastery of himself.

Laugh, and the world laughs with you; weep, and you weep alone.

能量守恒定律不仅是一条经验法则，更是思维的必然要求。