Nothing is so much to be feared as Evil Report. - Leonardo da Vinci

The false interpreters of nature declare that quicksilver is the common seed of every metal, not remembering that nature varies the seed according to the variety of the things she desires to produce in the world.

He who does not oppose evil......commands it to be done.

A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.