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Jealousy is, in some sort, rational and just; it aims at the preservation of a good which belongs, or which we think belongs, to us; whereas envy is a frenzy that cannot endure, even in idea, the good of others.

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Jun 22, 2026

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Quote Author: Isaac Barrow

Isaac Barrow

Isaac Barrow

Isaac Barrow (October 1630 - May 4, 1677) was an English divine, scholar and mathematician who is generally given minor credit for his role in the development of modern calculus; in particular, for his work regarding the tangent; for example, Barrow is given credit for being the first to calculate the tangents of the kappa curve. Isaac Newton was a student of Barrow's. Lunar crater Barrow is named after him.

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