Parental investment is the key to understanding sex differences in mating strategies.
真相很少是纯粹的，也绝不简单。
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
爱是非理性的。你越爱一个人，就越觉得一切都没有意义。
我本可以拥有另一种生活，但我正在过这种生活。
Always demand a deadline. A deadline weeds out the extraneous and the ordinary. It prevents you from trying to make it perfect， so you have to make it different. Different is better.
The greatest problem for mathematicians now is probably the Riemann Hypothesis.