He who would distinguish the true from the false must have an adequate idea of what is true and false.

Qui enim inter rerum et falsum scit distinguere, debet adaquatam veri et falsi habere ideam.

More information about this quote

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Original Citation

Spinoza, Baruch. Ethica, Ordine Geometrico Desmonstrata [Ethics, Demonstrated in Geometrical Order]. 1677, pt. 2, prop. 42, proof.

Current Citation

Spinoza, Benedict. Ethics, translated by Michael Silverthorne and Matthew J. Kinser. Cambridge University Press, 2018, pt. 2, prop. 42, proof.