在被记录之前，什么都没有真正发生过。

The most important thing is to keep the most important thing the most important thing.

The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

过去的危险是人们成为奴隶。未来的危险是人们可能成为机器人。

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.

Each generation takes the earth as trustees.

I'm not perfect, and I don't pretend to be.

迈向未知的每一步，都是理解世界和理解自己的一步。