The psychologist must avoid all forms of mental chemistry.

我们今天种植的每一棵树都是留给后代的遗产。

Leadership is about vision and responsibility, not power.

最好的故事是那些留给你的问题比答案更多的故事。

设定新目标或做新梦想永远不会太老。

The challenges in our lives are there to strengthen our convictions. They are not there to run us over.

科学的进步依赖于挑战未知的勇气和从失败中学习的智慧。