Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be, because of the obscurity of the subject, and the brevity of human life.
The only limit is the one you set yourself.
自然是上帝所著的一卷书。
It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be intelligent.
Happiness is not something you postpone for the future; it is something you design for the present.
一本好书是最好的朋友，今天如此，永远如此。
The most powerful tool in science is not technology, but imagination.