IF Polycarp is an object of great interest, as the disciple of St. John, and the hearer both of him and of other contemporaries of our Lord; if Justin is so, as having been the first man of eminent learning who came over from the walks of heathen philosophy to submit his min to the doctrine of Christ; Irenaeus, again, has claims upon our attention scarcely less, as having been brought up in the Christian faith under the eye of heathen philosophy, but imbued with Christian principles almost, if not quite, from his cradle, and at the same time displaying equal vigour of mind, if not equal knowledge of heathen learning, with either Justin or Clement