"I see it, but I don't believe it." Richard Dedekind More Quotes by Richard Dedekind More Quotes From Richard Dedekind We are justified in calling numbers a free creation of the human mind. Richard Dedekind mind math numbers For what I have accomplished and what I have become, I have to to thank my industry much more, my indefatigable working, rather than any outstanding talent. Richard Dedekind outstanding accomplished talent That which is provable, ought not to be believed in science without proof. Richard Dedekind proof ought As professor in the Polytechnic School in Zürich I found myself for the first time obliged to lecture upon the elements of the differential calculus and felt more keenly than ever before the lack of a really scientific foundation for arithmetic. Richard Dedekind foundation elements school