Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.
He who is not satisfied with a little, is satisfied with nothing.
"The best way to lead is to be inclusive."
在每个字里，都有作家灵魂的一部分。
The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.