The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

I'm not gonna be one of those people who has to look back and say, 'I should have done that.'

小说的艺术在于讲述那些无法讲述的东西。

"The world breaks everyone, and afterward, many are strong at the broken places."

估计问题的性质不同。在这里，我们不关心检验特定的假设，而是关心估计参数的值。

Simplicity is not simple to achieve.

The world is full of people who have never, since childhood, met an open doorway with an open mind.