Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.

In the end, we will remember not the words of our enemies, but the silence of our friends.

一本书是一个花园，一个果园，一个仓库，一场聚会，一路上的伙伴，一位顾问，众多的顾问。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

I did not write half of what I saw, for I knew I would not be believed.

开始的方法是停止空谈，开始行动。

遗传学是活人的考古学。

孔子说：“我曾整天不吃、整夜不睡，来思考。结果没好处，还不如学习。”