"My father suffered much and toiled painfully all his life, for he had no resources other than the proceeds of his tra…"

"The new art must be based upon science — in particular, upon mathematics, as the most exact, logical, and graphically…"

"There is no man on earth who can give a final judgment on what the most beautiful shape may be. Only God knows."

"Since geometry is the right foundation of all painting, I have decided to teach its rudiments and principles to all y…"

"Sane judgment abhors nothing so much as a picture perpetrated with no technical knowledge, although with plenty of ca…"

"Whoever … proves his point and demonstrates the prime truth geometrically should be believed by all the world, for th…"

"But I shall let the little I have learnt go forth into the day in order that someone better than I may guess the trut…"

"Wenn Einer Deutschland kennen // Und Deutschland lieben soll, // Wird man ihm Nürnberg nennen, // Der edlen Künste vo…"

"O, wie wird mich nach der Sonne frieren! Hier bin ich ein Herr, daheim ein Schmarotzer."

"Wer Dankbarkeit fordert, verdient keine."