一句话，先是太胆小，明知错的事却不敢不做；后来也还是太胆小，明知对的事却不敢去做。

"I don't want to be a product of my environment. I want my environment to be a product of me."

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

The most important thing in communication is hearing what isn't said.