What could be more physical than what you eat, where you live, and who you live with? These are all very physical issues.
I believe that the world isn't always what we can see. . . I believe there are secrets in the woods. And I believe that goodness wins out. . . So, if someone's changed overnight - by witch curse or poison apple or were-turtle - you have to show them what's good. You show them love. That works a surprising amount of the time.