Maria Edgeworth

“ He gave me an excellent disquisition on the effect which transcendental mathematics produces on the mind, and traced up the history of mathematics from Euclid, appealing to diagrams and resting on images, to that higher sort where they are put out of the question, where we reason by symbols as in algebra, and work on in the dark till they get to the light, or till the light comes out of the dark—sure that it will come out. ”