People are mostly shaped by their genes and their environment, but within those constraints, they have some freedom to choose their own path.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.
I don't believe in playing villains or heroes. I believe in playing people.
数学不是一项观赏性运动。你必须参与其中。