Life is composed of lights and shadows,and we would be untruthful,insincere,and saccharine if we tried to pretend there were no shadows.

One of the greatest ways to avoid trouble is to keep it simple...the system often goes out of control.

唯一真正的财富是灵魂的财富。

我的主要目标之一是制造工具，让工具本身塑造工件，使每个部分都获得恰当比例。

逻辑学研究不仅仅是关于推理规则，更是关于思想结构本身。