Painting is a companion with whom one may walk a great part of life's journey.

Sculpture, a very noble art, is one that does not in the execution require the same supreme ingenuity as the art of painting, since in two most important and difficult particulars, in foreshortening and in light and shade... the painter has to invent a process, [whereas] sculpture is helped by nature.

Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.

Painting a picture is like trying to fight a battle.

Without tradition, art is a flock of sheep without a shepherd. Without innovation, it is a corpse.

Painting is the same kind of problem as unfolding a long, sustained interlocked argument... It is a proposition commanded by a single unity of conception.