二战前生活很简单。之后，我们有了系统。

知识只有在分享时才有价值。

Every artist dips his brush in his own soul, and paints his own nature into his pictures.

明智的人会将自己的信仰与证据相协调。

每一个科学进步都迫使我们面对新的伦理问题。