“Everything that I understand, I understand only because I love”

“One machine can do the work of fifty ordinary men. No machine can do the work of one extraordinary man”

“Birth and ancestry, and that which we have not ourselves achieved, we can scarcely call our own”

“Passion, though a bad regulator, is a powerful spring”

“Experience is the teacher of all things”

“Any fool can paint a picture, but it takes a wise man to be able to sell it”