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The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy, and finally oblivion.

The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

解釋：駝背的人，是無法讓他直起身子來的。

體育是每個男人和女人遺產的一部分，它的缺席永遠無法得到彌補。

我們認識的最美麗的人是那些經歷過失敗、痛苦、掙扎、失去，并找到從深淵中走出來的人。

如果自由不包括犯錯的自由，那么自由就不值得擁有。