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The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
Liberty is obedience to self-imposed law.
I have to remind myself that some birds are not meant to be caged. Their feathers are just too bright.
我拍电影不是为了给出答案,而是为了提出问题。
Twenty years of romance make a woman look like a ruin; but twenty years of marriage make her look like a public building.
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step closer to understanding the fabric of reality.