The kids today are quite right about the music their parents listened to: most of it was trash. The parents are quite right about what their young listen to: most of it is trash, too.
“A theory is exactly like a box of tools. It has nothing to do with the signifier. It must be useful. It must function. And not for itself. If no one uses it, beginning with the theoretician himself (who then ceases to be a theoretician), then the theory is worthless or the moment is inappropriate. We don’t revise a theory, but construct new ones; we have no choice but to make others.”
Gilles Deleuze