21. “But when he again persisted, and said, ‘Swear by the genius of Cæsar,’ Polycarp replied, ‘If thou vainly supposest that I will swear by the genius of Cæsar, as thou sayest, feigning to be ignorant who I am, hear plainly: I am a Christian. But if thou desirest to learn the doctrine of Christianity, assign a day and hear.’