Happiness is not something that happens. It is not the result of good fortune or random chance. It is not something that money can buy or power command. It depends not on what happens outside of you, but on what happens inside of you.

In mathematics, the journey to the solution is just as important as the solution itself.

There is no despair so absolute as that which comes with the first moments of our first great sorrow, when we have not yet known what it is to have suffered and be healed, to have despaired and have recovered.

写作是唯一一件当我做的时候，我不会觉得我应该在做其他事情的事情。