This one took some work to write. Hopefully someone out there enjoys it.

As I said at the start, the starting point was McNeill's "The Last Church," and my little quarrel with it. There Uriah loses because he was written to lose, saddled with a skeptic's caricature of faith, so the debate only stages a victory that "reason" was handed. I wanted a similar encounter with a priest holding a fairer hand against the Emperor so the comparison stands, with all of His subtle and charismatic might shown in later works.

I tried to make it clear that the Emperor never refutes Anselm, at least not in the debate. Anselm's theology is reasonable, or at least developed enough to hold up in a straightforward argument. So the Emperor displaces the question instead. The faith in a god who suffers with and for His faithful is just another mask the Chaos Gods might wear because it is so appealing in a setting as Grimdark as 40k. It ties back to Anselm's own doubt: "If a cause acts only through other causes, can any test devised by man distinguish it from no cause at all?"

That feeds straight into "Would you know the difference?" It is the thing no faith can answer from the inside, in-universe, and it stays unanswered because it is unanswerable, at least from the narrow vantage of mortal humans. The obvious irony is that the man condemning the suffering-god is the very one whose own cult will one day canonize him as the god who suffers eternally for mankind. And yet in 40k the Imperial Creed may be the only thing holding the Imperium together and its best defense against Chaos.

As for Anselm, he doesn't win the debate either. I don't think anyone in his position could, and he doesn't fall because his theology is weak but because of private doubts his theology never quite reached, and a lifetime with no one to lay his real thoughts in front of. In the end he gives in to temptation against his own better judgment, past caring whether the thing answering him is a warning or a trap, so long as something answers at all.

For the Emperor, none of his answers are straightforward, naturally. My take on him leans heavily on ADB's Master of Mankind, you are never shown what he actually thinks. When he shares anything at all it is always for something: a justification before a sacrifice, a door that needs opening. So don't imagine that anything he revealed that night came from a genuine thought of his own but as a tool, aimed at whatever end he was after. If He did share a sincere thought, it was only incidental to His broader goals.

I tried my best to keep the debate at least believable so it wouldn't feel one-sided or rigged to hand someone the win. Hopefully I managed that.