Quote by Descartes, René

"The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function."

Descartes, René Wisdom
Philosopher-Mathematician French 1596–1650

More from Descartes, René

"I think, therefore I am."
"The greatest minds are capable of the greatest vices as well as of the greatest virtues."
"Doubt is the key to knowledge."
"If you would be a real seeker of truth, it is necessary that at least once in your life you doubt, as far as possible, all things."

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