Disgrace should be represented upside down, because all her deeds are contrary to God and tend to hell. - Leonardo da Vinci

These rules are of use only in correcting the figures; since every man makes some mistakes in his first compositions and he who knows them not, cannot amend them. But you, knowing your errors, will correct your works and where you find mistakes amend them, and remember never to fall into them again. But if you try to apply these rules in composition you will never make an end, and will produce confusion in your works.

as a well-spent day gives, joy in sleep
so a well-spent life brings, joy in dying

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