It is the simple truth that man does differ from the brutes in kind and not in degree; and the proof of it is here; that it sounds like a truism to say that the most primitive man drew a picture of a monkey and that it sounds like a joke to say that the most intelligent monkey drew a picture of a man. Something of division and disproportion has appeared; and it is unique. Art is the signature of man.

The artistic temperament is a disease that affects amateurs. Artists of a large and wholesome vitality get rid of their art easily, as they breathe easily or perspire easily. But in artists of less force, the thing becomes a pressure, and produces a definite pain, which is called the artistic temperament.

Lying in bed would be an altogether perfect and supreme experience if only one had a colored pencil long enough to draw on the ceiling.

Every work of art has one indispensable mark ... the center of it is simple, however much the fulfillment may be complicated.

Architecture approaches nearer than any other art to being irrevocable because it is so difficult to get rid of.