Slow, Slow, Fresh Fount Art and Culture Quotes

How we cite our quotes: (Line)

Quote #4

Our beauties are not ours (7)

This line is quite the mystery. If our "beauties" are not "ours," this might also mean that the beautiful things we produce (like songs) don't belong to us either. But then to whom do they belong? The powers of inspiration that send them to us? Or the people with whom we share them?