I don’t have time to worry about something as trivial as what I look like.
The most powerful tool for change is knowledge, rigorously pursued and widely shared.
有时帮助穷人的最好方式是给他们现金,让他们自己决定如何使用它。
"Greatness is a lot of small things done well."
Change is uncomfortable, but it's necessary for progress.
真相很少是纯粹的,也从不简单。