Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.
Make your work to be in keeping with your purpose
Medicine is the restoration of discordant elements.
The wisest and noblest teacher is nature itself.
I say that the power of vision extends through the visual rays to the surface of non-transparent bodies, while the power possessed by these bodies extends to the power of vision.
Necessity is a guardian in Nature.