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Time has no divisions to mark its passage, there is never a thunderstorm or blare of trumpets to announce the beginning of a new month or year.

The best way to learn mathematics is to do mathematics.

Success is the sum of small efforts repeated day in and day out.

我不相信上帝，但我想念他。

If you're not failing occasionally, you're not pushing the boundaries enough.

There are only two kinds of people who are really fascinating—people who know absolutely everything and people who know absolutely nothing.