O mundo é um livro, e quem não viaja lê apenas uma página.
Innovation should never be for its own sake—it must serve a real purpose.
我相信掌握别人已经摸索出的最佳方法是一门学问。我不相信只是坐下来自己空想。
A dreamer is one who can only find his way by moonlight, and his punishment is that he sees the dawn before the rest of the world.
The highest knowledge is the knowledge of the self.