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一个好的数学家是能看到定理之间类比的人;一个伟大的数学家是能看到类比之间的类比的人。
A good mathematician is one who can see analogies between theorems; a great mathematician is one who can see analogies between analogies.
If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.
解读:知晓道理容易,付诸实践却困难重重,很多人困于理论,缺乏行动力,知行脱节带来巨大的挫败感与自我怀疑,督促人行动起来。