"Tennis is a sport where you have to be strong mentally and physically, but the mental part is even more important."

Psychology must be grounded in the reality of the organism's struggle to exist.

 工作让我们远离三种邪恶：无聊、恶习和贫困。

文学的衰落表明一个民族的衰落。这两者走下坡路的时候是齐头并进的。

White is the most wonderful color because within it one can find all the colors of the rainbow.

Understanding the universe requires not just intelligence, but imagination.