唯一的力量就是说"不"的力量。
The only power is the power to say no.
Everyone thinks of changing the world, but no one thinks of changing himself.
有时候最难的事情和最正确的事情是同一件事。
Psychology must show how mind serves the needs of the organism.
The only way to keep the small folk loyal is to make sure they fear you more than they fear your enemies.
You can't knock on opportunity's door and not be ready.
The essence of mathematics is not just in solving problems but in asking the right questions.