In my experience, people learn as much theology from the hymns and songs they sing in worship than they do from the sermons. This is why it is important to take great care in choosing church music. A snappy melody isn’t enough. We always need to ask, “What is this song teaching about the nature of God – and is it true?”
The PC(USA) just published a list of songs to be included in the new, official PC(USA) hymnal. Read this article, and the responses, to see what you think this choice says about the denomination’s theology.