The best way to be happy is to live in the moment.

Fear is the main source of superstition， and one of the main sources of cruelty. To conquer fear is the beginning of wisdom， in the pursuit of truth as in the endeavour after a worthy manner of life.

根据自然法，人生而自由。

"The only thing we know about the future is that it will be different."

如果我们用耕种土地的方式耕种海洋，我们将重蹈覆辙。

心理学的目的是解释我们如何设法生活。