G.K. Beale's great book You Are What You Worship walks us through a biblical theology of worship. The title is self-explanatory; as humans we become like that which we worship. James K.A. Smith does the same thing in a slightly more accessible way in You Are What You Love. What both Beale and Smith pick up on is a truth that we so often want to forget. The things we love most are the things that fundamentally shape us.