Cyprian of Carthage is the most fulsome and direct user of sacrificial language in relation to Christian worship and organisation up to his own time, even though his community experienced persecution under the emperor Decius via a decree of universal sacrifice. Cyprian’s De lapsis and his Letter 63 both use common knowledge about sacrificial ritual shared between Jews, Christians, and other Romans to make more specific points in controversies over reconciliation of apostates and use of wine in the Eucharist. Cyprian’s use of shared assumptions about ritual helps reveal shared ancient understandings about sacrifice, centred not on altruism or violence but on gift. His formulations also reflect how he, like Decius, was seeking to use older ideas of tradition and communal solidarity in the service of new challenges.