The world we see that seems so insane is the result of a belief system that is not working. To perceive the world differently， we must be willing to change our belief system， let the past slip away， expand our sense of now， and dissolve the fear in our minds.

机智是一种在不树敌的情况下表达观点的艺术。

The beauty of a structure lies in its logic.

真相很少纯粹，也绝不简单。