Mathematics is not a spectator sport; you have to play to understand.
数学不是观赏性运动,你必须参与其中才能理解。
To live is the rarest thing in the world. Most people exist, that is all.
The key to sustainable success is balancing profit with purpose.
The universe is not required to be in perfect harmony with human ambition.
I’m a perfectionist. I’m pretty much detail-oriented.
I am the only person in the world I should like to know thoroughly; but I don’t see any chance of it just at present.
I don't regret my past; I just regret the time I wasted on the wrong people.