When that which loves is united to the thing beloved it can rest there; when the burden is laid down it finds rest there. There will be eternal fame also for the inhabitants of that town, constructed and enlarged by him.

Avoid the precepts of those thinkers whose reasoning is not confirmed by experience.

We, by our arts may be called the grandsons of God.

O speculators about perpetual motion, how many vain chimeras have you created in the like quest? Go and take your place with the seekers after gold.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils

Every action done by nature is done in the shortest way.

The merit of painting lies in the exactness of reproduction. Painting is a science and all sciences are based on mathematics. No human inquiry can be a science unless it pursues its path through mathematical exposition and demonstration.