Cheerfulness is the best promoter of health and is as friendly to the mind as to the body.

科学的进步是人类集体努力的结果。

领导力就是做出艰难的决定并坚持下去。

It's so hard to say goodbye to yesterday

"Books are the plane, and the train, and the road. They are the destination, and the journey. They are home."

心理过程进化是为了解决实际问题。