Some persons have contended that mathematics ought to be taught by making the illustrations obvious to the senses. Nothing can be more absurd or injurious: it ought to be our never-ceasing effort to make people think, not feel.
Samuel Taylor Coleridge (1856). “Seven Lectures on Shakespeare and Milton: A List of All the Ms. Emendations in Mr. Collier's Folio, 1632”, p.23
