The best way to predict the future is to create it.

Persistence in research often pays off when you least expect it.

Understanding the real lives of the poor is the first step toward designing effective policies to help them.

After all, life is never so jolly or so miserable as people seem to think.

世界上最昂贵的东西是信任。赢得信任可能需要数年，而失去它可能只需要几秒钟。