That is one hard truth.It's hard to put a leash on a dog once you've put a crown on its head.

The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.

The people who are crazy enough to think they can change the world are the ones who do.

数学的真正力量不在于它的复杂性，而在于它的简洁和优雅。

Memory is a complicated thing, a relative to truth, but not its twin.