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It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.

史記

伽羅瓦表示的研究證明了代數方法的力量。

追求真理是人類最高尚的事業。

Money is concerned only with what is common to all, i.e., the exchange value, and it reduces all quality and individuality to the question: How much?

Every problem in mathematics is an opportunity to learn something new.