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.

最好的表演来自于脆弱和真实的地方。

Mathematics is the art of giving the same name to different things.

我不害怕跌倒，我害怕对跌倒的恐惧。