失敗は成功の母であるが、それを認める勇気がなければ何も生まれない。
失败是成功之母，但如果没有承认它的勇气，就什么也不会产生。
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.
In the realm of mathematics, every problem is an opportunity to discover something new.
The deterioration of every government begins with the decay of the principles on which it was founded.
You can’t live in the world without an idea of the world, but it’s impossible to live in the world with your idea of the world.
我不想被限制在一个框架里。