Florinus, as we learn from chap. 15, was for a time a presbyter of the Roman Church, but lost his office on account of heresy. From the fragment of this epistle of Irenæus to Florinus quoted by Eusebius just below, we learn that Florinus was somewhat older than Irenæus, but like him a disciple of Polycarp. The title of this epistle shows that Florinus was already a Gnostic, or at least inclined toward Gnostic views. Eusebius evidently had no direct knowledge of the opinions of Florinus on the origin of evil, for he says that he appeared to maintain (ἐδόκει προασπίζειν) the opinion that God was the author of evil. Eusebius’ conclusion is accepted by most ancient and modern writers, but it is suggested by Salmon (Dict. of Christ. Biog. II. 544) that Eusebius was perhaps mistaken, “for, since the characteristic of dualism is not to make God the author of evil, but to clear him from the charge by ascribing evil to an independent origin, the title would lead us to think that the letter was directed, not against one who had himself held God to be the author of evil, but against one who had charged the doctrine of a single first principle with necessarily leading to this conclusion. And we should have supposed that the object of Irenæus was to show that it was possible to assert God to be the sole origin and ruler of the universe, without holding evil to be his work.” Since Eusebius had seen the epistle of Irenæus to Florinus, it is difficult to understand how he can have misconceived Florinus’ position. At the same time, he does not state it with positiveness; and the fact that Florinus, if not already, certainly was soon afterward a Valentinian, and hence a dualist, makes Salmon’s supposition very plausible. Florinus is not mentioned in Irenæus’ great work against heresies, nor by Tertullian, Pseudo-Tertullian, Hippolytus, or Epiphanius. It is probable, therefore, that he was not named in Hippolytus’ earlier work, nor in the lectures of Irenæus which formed the groundwork (see Salmon, l.c.). The silence of Irenæus is easily explained by supposing Florinus’ fall into heresy to have taken place after the composition of his lectures against heresies and of his great work; and the silence of the later writers is probably due to the fact that Irenæus’ work makes no mention of him and that, whatever his influence may have been during his lifetime, it did not last, and hence his name attracted no particular attention after his death. It has been maintained by some (e.g. Lightfoot in the Contemporary Review, 1875, p. 834) that this epistle to Florinus was one of the earliest of Irenæus’ writings but Lipsius (Dict. of Christ. Biog. III. 263) has given other and satisfactory reasons for thinking that Florinus’ heresy, and therefore Irenæus’ epistle and his work On the Ogdoad, belonged to the time of Victor, and hence were later than the work Against Heresies. A Syriac fragment of an epistle concerning Florinus, addressed by Irenæus to Victor (Harvey’s edition, Fragm. 28), is extant, and supports Lipsius’ conclusion. It would seem that Irenæus, subsequent to the writing of his great work, learning that Florinus was holding heretical opinions on the origin of evil, addressed him the epistle mentioned in this chapter. That afterward, Florinus having embraced Valentinianism, and having written “an abominable book” (as the fragment just referred to says), Irenæus wrote his work On the Ogdoad, and subsequently addressed his epistle to Victor, calling upon him to take decisive measures against Florinus, now seen to be a regular heretic. What was the result of Irenæus’ epistles and book we do not know; we hear nothing more about the matter, nor do we know anything more about Florinus (for Augustine’s mention of Florinus as the founder of a sect of Floriniani is a mistake; see Salmon, l.c.).