Failure is interesting—it’s part of making progress. You never learn from success, but you do learn from failure.

The past is always there, but it's not the only thing that's there.

你必须强迫自己考虑反对的论点。尤其是当他们挑战你最喜爱的观点时。

The secret of change is to focus all your energy not on fighting the old, but on building the new.