Ethics, Part III, Definition of the Emotions 44
Ambition is the immoderate desire of power.
Explanation
Ambition is the desire, whereby all the emotions (cf. III. xxvii. and xxxi.) are fostered and strengthened; therefore this emotion can with difficulty be overcome. For, so long as a man is bound by any desire, he is at the same time necessarily bound by this. "The best men," says Cicero, "are especially led by honour. Even philosophers, when they write a book contemning honour, sign their names thereto," and so on.
Benedict de Spinoza, The Ethics (Ethica Ordine Geometrico Demonstrata), translated from the Latin by R. H. M. Elwes.
First published in The Chief Works of Benedict de Spinoza, vol. II (London: George Bell and Sons, 1884).
This translation is out of copyright in the United States, where it was published in 1884, and wherever the copyright term is the author's life plus 100 years or less; its translator died in 1892.
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Digital text: Project Gutenberg eBook #3800