Those who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.

A day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.

Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.

The painter has the Universe in his mind and hands.

The part always has a tendency to reunite with its whole in order to escape from its imperfection.

Lying on a feather mattress or quilt will not bring you renown.

The knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.