精穷文章，而能析诸器行也；精穷天应，而能审诸器用也。
翻译：指出深入研究文章可以分析器物的性能，而深入了解自然规律则可以审视器物的用途。
Men become civilized, not in proportion to their willingness to believe, but in proportion to their readiness to doubt.
The greatest thing in the world is to know how to belong to oneself.
“唯一真正不朽的是人类的遗产。”
The footsteps of Nature are to be traced, not only in her ordinary course, but when she deviates from it in her most extravagant excursions.