As long as algebra and geometry proceeded along separate paths, their advance was slow and their applications limited. But when these sciences joined company, they drew from each other fresh vitality and thenceforward marched on at a rapid pace toward perfection.

— Joseph-Louis Lagrange, Leçons Élémentaires sur les Mathématiques (1795)

Source: https://archive.org/stream/memorabiliamathe00moriiala#page/80/mode/2up

Cited via Moritz's Memorabilia Mathematica (1914).

Topics: mathematics