"We are all haunted by the ghosts of our past, but it's up to us whether we let them haunt us or guide us."

Nature has placed mankind under the governance of two sovereign masters， pain and pleasure.

世界是生者的地方，死者在其中没有位置。死者什么都不是。他们甚至不是记忆。他们被遗忘了。

The most important single central fact about a free market is that no exchange takes place unless both parties benefit.

The only person who is educated is the one who has learned how to learn and change.