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By used books. They have the same words as the new ones. Also libraries.
The truth is, I don't know what I would have done without mathematics.
The historian must have some kinship with his subject. The dead will not speak unless they are properly addressed.
Music has healing power. It has the ability to take people out of themselves for a few hours.
数学不是关于数字、方程、计算或算法的:它是关于理解的。
在我知道自己已经开始之前,我已经深陷其中。
The true power of mathematics lies in its ability to reveal the hidden patterns and structures that govern the universe.