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最好的书……是那些告诉你你已经知道的事情的书。
The very least you can do in your life is to figure out what you hope for. And the most you can do is live inside that hope. Not admire it from a distance but live right in it, under its roof.
"To travel is to discover that everyone is wrong about other countries."
A mathematician's work is never done; there are always more problems to solve.