It'd be a shame to talk about the universe and not show some images of it, because we have some of the more stunning representations of our field relative to any of the sciences. But I don't use the imagery as a substitute for the insights and wisdom I can convey so that when you leave you say to yourself, "Wow, I'm a little more deeply connected to the universe, and I want to learn more. "
If you and your church were to disappear off the face of the earth tomorrow, would anyone in the community around you notice you were gone? And if the community did even notice would they say 'we are really glad they are gone', or 'we are really going to miss them'?