Harmonies are affects. Consonance and dissonance, harmonies of tone or colour, are affects of music and painting […] the artist creates blocs of percepts and affects but the compound must stand up on its own. The artist’s great difficulty is to make it stand up on its own.
Deleuze and Guattari, What is Philosophy?
It is silly, absurd, stupid to the highest degree, to pretend that art will remain indifferent to the convulsions of our epoch. The events are prepared by people, they are made by people, they fall upon people and change these people. Art, directly or indirectly, affects the lives of the people who make or experience the events. This refers to all art, to the grandest, as well as to the most intimate.
Leon Trotsky| Literature and Revolution