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写作的行为是一种乐观的行为。如果你觉得它不重要,你就不会费心去做。
If your goal does not have a schedule, it is a dream.
The best scientists are those who never stop asking why.
The deeper you go into mathematics, the more you realize how much remains unknown.
To be human is to be vulnerable.
The joy of mathematics is in the struggle to understand.