But the spirit of rock, at least, can suggest an idea or two. Beethoven's music once was contemporary. Beethoven's music was also revolutionary. And the list could go on. Classical music, lots of it, is dance music.
Italian opera ought to be larger than life.
These questions are especially crucial for younger classical musicians, who didn't experience earlier musical revolutions, and weren't around when classical music still burned with the fire of its own great tradition. You could say they should study the past.