The Infinite! No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite.
Share this quote
Source, in full
"Über das Unendliche" ["On the Infinite"] (1925) address to der Westfälischen Mathematischen Gesellschaft in honour to the memory of Karl Weierstrass, Mathematische Annalen, 95 (1926) pp. 161-190, as quoted by Tobias Dantzig, Number The Language of Science (1930)