It is not enough to have a good mind; the main thing is to use it well. - René Descartes

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Engraved portrait of René Descartes, facing right

It is not enough to have a good mind; the main thing is to use it well.

English
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About René Descartes

René Descartes (March 31, 1596 – February 11, 1650) was a highly influential French philosopher, mathematician, physicist and writer. He is known for his influential arguments for substance dualism, where mind and body are considered to have distinct essences, one being characterized by thought, the other by spatial extension. He has been dubbed the "Father of Modern Philosophy" and the "Father of Modern Mathematics." He is also known as Cartesius.

Biography information from Wikiquote · Portrait adapted from Wikimedia Commons, After Frans Hals (Public domain / CC0)

Also Known As

Alternative Names: Descartes Cartesius Renatus Cartesius Renė Dekartas

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Additional quotes by René Descartes

Los orígenes del método están, según nos cuenta Descartes ( Discurso), en la lógica, el análisis geométrico y el álgebra. Conviene ante todo insistir en que el gravísimo defecto de la lógica de Aristóteles es, para Descartes, su incapacidad de invención.

it
would be surprising if I had a clearer grasp of things that I
realize are doubtful, unknown and foreign to me — ·namely,
bodies· — than I have of what is true and known — namely
my own self. But I see what the trouble is: I keep drifting
towards that error because my mind likes to wander freely,
refusing to respect the boundaries that truth lays down. Very
well, then; I shall let it run free for a while, so that when
the time comes to rein it in it won’t be so resistant to being
pulled back.

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