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The power of mathematics is in its abstraction, allowing us to see patterns and connections that are not immediately obvious.
The study of the mind must be free from all preconceived notions.
现象是隐秘的本质所显现的外表。
后见之明对历史学家乃至回忆录作者非常有用,但遗憾的是,实践中的政治家却无法拥有。