Stuck in Romans 12

I'm stuck. I've been reading and rereading Romans 12 for about the past week (at least I think it has been a week...keep in mind that I have a newborn baby so my relationship to time is seriously altered). While the first few verses are highly memorized and get much play, I'm caught most by the end of that chapter. Simple sentences. First-grade-reading-level sentences. But the impact is amazing. And I struggle on varying levels with just about every simple, weighty sentence Paul throws at that early Roman church. I find that it isn't the hard theological arguments that trip me up but the simple, you-know-what-this-means stuff.