The universe is not hostile, nor yet is it friendly. It is simply indifferent.

You are the artist of your own life.

Psychology must study the adaptive functions of thought and behavior.

That neither our thoughts， nor passions， nor ideas formed by the imagination， exist without the mind， is what every body will allow.

数学中最令人兴奋的时刻是当你发现两个看似不相关的领域有着深刻的联系。

生命是用来度过的，不是用来节省的。