Your favourite arts-related quote?

What is your favourite quote related to the arts? It can be from a poem, a story, a song, or even just a quotation attributed to someone about the arts.

For me it's Nietzsche:

"Without music, life would be a mistake."

Very good thread!

“Words have no power to impress the mind without the exquisite horror of their reality” - Edgar Allan Poe

Poe is such a fountain of wit and insight