People always say that you can't please everybody. I think that's a cop-out. I think if you work hard enough, you can please everybody.

Better pass boldly into that other world, in the full glory of some passion, than fade and wither dismally with age.

数学的本质在于其自由性。

Continuous partial attention is an always-on, anywhere, anytime, any place behavior that involves an artificial sense of constant crisis.