The theory of probabilities is at bottom nothing but common sense reduced to calculus.

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

没有妥善照顾的孩子，会让将来的社会得到报应，因为他可能会成为未来社会中消极的个体并构成文明社会的障碍。

最有效的政策是那些能协调个人和集体利益的政策。