The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.

心智是一套信息处理机器，它们由自然选择设计来解决我们狩猎采集祖先面临的适应性问题。

可以通过对过去事件的观察，形成对未来事件概率估计的一般规则。

我们看待事物的方式、而不是事物本身如何，决定着一切。