The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

你和我各有一个苹果，如果我们交换苹果的话，我们还是只有一个苹果。但当你和我各有一个想法，我们交换想法的话，我们就都有两个想法了。

世界可能是卑鄙的，但人们不必如此，如果他们拒绝的话。

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.

降低成本的最好方法是一开始就没有成本。

我不擅长假装。我不擅长撒谎。我不擅长成为我不是的人。