procrastinating

I'm busy procrastinating. I should be writing an essay (title "Was Nestorius a heretic?"). I quite enjoyed doing all the research, although getting through Nestorius' Bazaar of Heracleides  took some doing - it's not at all easy to read. Anyway, as usual, I find myself in sympathy with the so-called heretic. It looks as though Nestorius fell victim to an outbreak of political machinations, disguised as theology. Which did make me wonder how many of our so-called theological differences are in fact power struggles in disguise?
But then I thought of Sunday's sermon, delivered by a visiting preacher. They obviously had quite a reformed understanding of Scripture and of God. I don't share that view, and find listening to it quite difficult. For a sermon about forgiveness and the sheer scale of God's forgiveness, it was amazingly joyless. How can you preach about forgiveness in such a way that it makes people feel bad?
But then I have to ask myself, is that a genuine theological difference, or just a power struggle in disguise?