The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

We don't inherit the earth from our ancestors; we borrow it from our children—this belief shapes everything we do.

Greatness is not about being the best, it's about being better than you were yesterday.

我们这些幸运的人有责任回馈社会。至于是像我这样边走边捐，还是像沃伦那样先捐一点，然后（死后）再捐很多，这是个人喜好问题。