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The moving power of mathematical invention is not reasoning, but imagination.

— Augustus De Morgan

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Imagination

More quotes by Augustus De Morgan

The lowest steps of the ladder are as useful as the highest.

On the Study and Difficulties of Mathematics (1831)

If much difficulty should be experienced in the elementary chapters, I know of no work which I can so confidently recommend to be used with the present one, as that of M. Duhamel.

The Differential and Integral Calculus (1836)

The work now before the reader is the most extensive which our language contains on the subject.

The Differential and Integral Calculus (1836)

I am far from saying that this Treatise will be easy; the subject is a difficult one, as all know who have tried it.

The Differential and Integral Calculus (1836)

A large quantity of examples is indispensable.

The Differential and Integral Calculus (1836)

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Some of my youthful readers are developing wonderful imaginations. This pleases me.

L. Frank Baum Introduction to The Lost Princess of Oz (1917)

There is an inverse relationship between imagination and money.

Alan Moore

An active imagination may find a bad tendency arising out of every transaction between imperfect morals.

Edward Hall Alderson Brownlow v. Egerton (1854)

Nothing is more dangerous to reason than the flights of the imagination, and nothing has been the occasion of more mistakes among philosophers.

David Hume A Treatise of Human Nature (1739)

Attribution

Quote text and notes from Wikiquote: Augustus De Morgan (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.