每个单子都是一个中心，无限地体现了周围的宇宙。
勇气是正义的首要品质。
不必担忧财富不多，只须担忧财富不平均，不必担忧人口稀少，只须担忧境内不安宁。……既来了，要使他们安家乐业。
"The only way to do great work is to love what you do."
The world is a place of the living, and the dead have no place in it. The dead are nothing. They are not even a memory. They are forgotten. And the living, too, will be forgotten.
