Some people are extraordinarily good at knowing the limits of their knowledge because they have to be.

我工作得非常缓慢。这是一个层层叠加和调整的过程，直到感觉对了为止。

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

Language is a skin: I rub my language against the other. It is as if I had words instead of fingers, or fingers at the tips of my words.