True scientific progress is achieved not by mere accumulation of facts, but by the continuous refinement of theories and models.

不，不是富有。我是一个有钱的穷人，这不是一回事。

你不需要成为摇滚明星才能改变世界。

——伦敦《每日纪事报》刊出〈孙逸仙讲述他第一次起事反抗中国皇朝之故事〉，1911年10月14日

The smartest people are all self-taught, even if they went to school.

"There is no such thing as a new idea. It is impossible. We simply take a lot of old ideas and put them into a sort of mental kaleidoscope. We give them a turn and they make new and curious combinations."

你把桃子投于我，我把李子回赠与你。桃子和李子价值相当，表明我本人是知恩图报的，也有互相赠送，礼尚往来的意思。