You can tell when something's not moving forward anymore. When the doubts you have about it don't go away.
“The savage repression of blacks, which can be estimated by reading the obituary columns of the nation's dailies, Fred Hampton, etc., has not failed to register on the black inmates.”
“In a decaying society, art, if it is truthful, must also reflect decay. And unless it wants to break faith with its social function, art must show the world as changeable. And help to change it.”