I think a "song" is, like, just play it on the guitar and sing it. You look out and see thousands of covers of "Animal" for example, so you think, "That was probably a pretty good song, because people feel like it's satisfying to just play it with one instrument accompanying it. "
There's no greater feeling than people coming up to me and going, "Man, my father was dying, and we went to see Rush Hour, and it was the greatest night we had in years together. We sat in that theater and we laughed for two hours without stopping. That was just a great memory that I had before my father died. "