Glee on Aesthetics

This last week's episode of The Rocky Horror Glee Show had two different messages about art and music:

"Isn't that the whole point of the arts? Push boundaries, doing things people say you can't do, for the sake of self-expression?" - Mr Schuster (Matthew Morrison)

"Artists are free to push boundaries to make art. But when pushing boundaries is the only aim, the result is usually bad art." - Sue Slyvester (Jane Lynch)

Critical commentary about Glee and this episode aside, these thoughts come from the hero and the enemy, and we're led to believe what Mr Schuster says. But should we?

What do you think? Is it necessary to push boundaries to make art? Is self-expression a requirement for art, or is art "a lie"?

Chime in below!