Culture means, I think, that you have widened your experience enough through reading and through being a little bit thoughtful about these things that it has changed your outlook in some ways. And not necessarily made you a better human being but made you see things.
I think one of the things about writing in the studio is that the song hasn't matured, if you like, so quite often the vocals are early attempts. Whereas once you've taken it out on the road a bit, you learn more about a song.