He even provided theological reasons for the repression: he pointed out to one of his Donatist friends that Jesus had told a parable in which a host had filled up places at his banquet with an order, ‘Compel them to come in’.37 That meant that a Christian government had the duty to support the Church by punishing heresy and schism, and the unwilling adherence which this produced might be the start of a living faith. This was a side of Augustine’s teaching which had much appeal to Christian regimes for centuries to come.

