that einstein tells that when he would get stuck on a physics problem sometimes, he'd stop. he'd go and play the violin. >> yeah. >> and he'd come back and there are now people who said you're actually exercising different parts of the brain when you do that, and that produces precisely the literal cross fertilization. >> when he was trying to get general relativity, all the years in 1912, 1913, he's living in berlin, and he gets stumped. he'd play mozart on his violin and he'd say, that reconnects me to the harmony of the universe. and it was that ability to feel the aharmonies of music and harmonies of nature's laws that is the exemplar of what we've been talking about. >> is there a difference between the kind of genius that an albert einstein has and the inventiveness of a ben franklin? i think a lot of people will say to themselves, look, i'm never going to be einstein, but i wonder what is it that made ben