Louis Althusser - On Ideology - p. 178

"I know that the artist, and the art lover, spontaneously express themselves in terms of 'creation', etc. It is a 'spontaneous' language, but we know from Marx and Lenin that every 'spontaneous' language is an ideological language, the vehicle of an ideology, here the ideology of art and of the activity productive of aesthetic effects. Like all knowledge, the knowledge of art presupposes a preliminary rupture with the language of ideological spontaneity and the constitution of a body of scientific concepts to replace it. It is essential to be conscious of the necessity for this rupture with ideology to be able to undertake the constitution of the edifice of the knowledge of art."