First of all, I've got to say that Seiko had some great tips about song structure, but Azrael's views about music theory aren't quite accurate. I'm a theory buff and I write tons of my own stuff. And yes, it's truly my own. Seeing as you're a Christian band (more power to you), you're problem might not be with technicality, but with inspiration. Spend some time with God and it'll come. I'm not saying that it'll come right away, but give it time. One day you'll be messin' around and all of the sudden everything will click and fall into place. I've also got to say that you're already doing a great job by not settling for less. It's said that great art is never completed, just abandoned. It's GREAT that you're knit-picky about this. So many other bands and writers just crap a bunch of stuff out and call it music. The fact that you want to perfect it should give hope to the music world!