"Just as each spoken word rouses an internal vibration, so does every object represented." p. 50

"There is no 'must' in art, because art is always free." p. 50

"Inner necessity is the basis of both small and great problems in painting." p. 54

"Color is the keyboard, the eyes are the hammers, the soul is the piano with many strings." p. 45

"It is evident therefore that color harmony must rest ultimately on purposive playing upon the human soul; this is one of the guiding principles of internal necessity." p. 45

"form is the external expression of inner meaning."

"Everything is at first a matter of feeling." p. 54

"The final abstract expression of every art is number." p. 73

"Painting is an art; and art is not vague production, transitory and isolated, but a power which must be directed to the development and refinement of the human soul, to raising the triangle of...