I attended a concert featuring Paul Simon, Wynton Marsalis and the Jazz at Lincoln Center Orchestra, a couple days after hearing Philip Glass talk about "where" music is. Wynton made strikingly similar observations
Just looking at him, seeing him move and listening to him, I wouldn't have believed that Paul Simon was over 70 years old.
At the end of the concert, Wynton Marsalis (below on the right) publicly thanked Paul Simon
for his participation and wonderful music. The musicians had had an amazing time collaborating, infusing various jazz flavors into Paul Simon's compositions.
Among other things, Wynton said that music comes from "the realm of the invisible," a place where emotions and thoughts are — and also love. For "thoughts," I heard "thoughts like math and computer software."