Authors:

Augustus De Morgan Quotes

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

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

"The Life of Sir William Rowan Hamilton". Book by Robert Perceval Graves, Volume 3, p. 219, 1889.

I did not hear what you said, but I absolutely disagree with you.

"The Quantum Brain: Theory and Implications". Book by August Stern, p. 7, 1994.

Wrong hypotheses, rightly worked from, have produced more useful results than unguided observations.

Augustus De Morgan (1872). “A Budget of Paradoxes Reprinted, with the Author's Additions, from the Athenaeum Augustus De Morgan”, p.55

I am perfectly convinced that I have both seen, and heard in a manner which should make unbelief impossible, things called spiritual which cannot be taken by a rational being to be capable of explanation by imposture, coincidence, or mistake.

Augustus De Morgan (1863). “From Matter to Spirit: The Result of Ten Years'experience in Spirit Manifestations. Intended as a Guide to Enquirers”, London, Longman, Green, Longman, Roberts, & Green

I don't quite hear what you say, but I beg to differ entirely with you.

Sophia Elizabeth De Morgan, Augustus De Morgan (2010). “Memoir of Augustus De Morgan: With Selections from His Letters”, p.137, Cambridge University Press

Common integration is only the memory of differentiation.

"Modern Computer Algebra". Book by Joachim von zur Gathen, April 25, 2013.

My opinion of mankind is founded upon the mournful fact that, so far as I can see, they find within themselves the means of believing in a thousand times as much as there is to believe in.

Augustus De Morgan (1872). “A Budget of Paradoxes Reprinted, with the Author's Additions, from the Athenaeum Augustus De Morgan”, p.70