自然界和道德世界是人类理性关注的双重对象。

Your attitude, not your aptitude, will determine your altitude.

The most profound discoveries in mathematics often come from the simplest observations.

说话有分寸则少得罪人；行为有节制则少悔恨；爱慕有节制则要求少；快乐有节制则祸败少；饮食有节制则疾病少。

 Better to choose the freedom of poverty than the slavery of wealth.

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。