天文学的历史是一部视野不断扩展的历史。

道德领导力不是追求完美，而是承担责任。

Understanding the psychology of risk can help us make better decisions in uncertain situations.

In chemistry, as in life, sometimes you need to take a step back to see the bigger picture.

生活就是关于成长和改变。当你停止成长，你就停止了生活。

最大的快乐就是没有快乐，最大的荣 誉就是没有荣誉。指快乐和荣誉都是相对而言的。

The only philosophy which can be responsibly practiced in face of despair is the attempt to contemplate all things as they would present themselves from the standpoint of redemption.