In the realm of psychology, the line between normal and abnormal is often blurred and subjective.

"I'm a perfectionist, I admit it. I'm always trying to improve."

质量从来不是偶然的；它始终是智慧努力的结果。

我们的科学力量已经超过了我们的精神力量。我们有导弹，但我们的人类道德方向已经偏离。

The more we learn about the universe, the more we realize how much we have yet to discover.

世界是一本书，不旅行的人只读了一页。