Art has a social purpose [and] art belongs to the people. It’s not something that is hanging out there that has no connection with the needs of man. And art is unashamedly, unembarrassingly, if there is such a word, social. It is political; it is economic. The total life of man is reflected in his art.

Art has a purpose, which is to interest its audience.

Good art (like good anything) is art that achieves its purpose

particularly well.