The painter, the poet, the composer do not hold up a mirror to nature, however ideal, but invent; they do not imitate (the doctrine of mimesis), but create not merely the means but the goals that they pursue; these goals represent the self-expression of the artist's own unique, inner vision, to set aside which in response to the demands of some "external" voice — church, state, public opinion, family friends, arbiters of taste — is an act of betrayal of what alone justifies their existence for those who are in any sense creative