我们都只是过客，像沙滩上的脚印一样留下自己的痕迹。

The artist must be in his work as God is in creation, invisible and all-powerful; one must sense him everywhere but never see him.

The study of the mind must be purely analytical.

"To understand the future, one must first understand the past."

All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.