In the period in which the Arian controversy is by far the most important series of events in Church history, the attitude of the sons of Constantine toward heathenism and Donatism was of secondary importance, but it should be noticed as throwing light on the ecclesiastical policy which made the Arian controversy so momentous. In their policy toward heathenism and dissent, the policy of Constantine was carried to its logical completion in the establishment of Christianity as the only lawful religion of the Empire (§ 67). Arianism may be regarded as the last attempt of Dynamistic Monarchianism (_v. supra_, § 40) to explain the divinity of Jesus Christ without admitting His eternity. It was derived in part from the teaching of Paul of Samosata through Lucian of Antioch. Paul of Samosata had admitted the existence of an eternal but impersonal Logos in God which dwelt in the man Jesus. Arianism distinguished between a Logos uncreated, an eternal impersonal reason in God, and a personal Logos created in time, making the latter, the personal Logos, only in a secondary sense God. This latter Logos, neither eternal nor uncreated, became incarnate in Jesus, taking the place in the human personality of the rational soul or logos. To guard against the worship of a being created and temporal, and to avoid the assertion of two eternal existences, the anti-Arian or Athanasian position, already formulated by Alexander, made the personal Logos of one essence or substance with the Father, eternal as the Father, and thereby distinguishing between begetting, or the imparting of subsistence, and creating, or the calling into being from nothing, a distinction which Arianism failed to make; and thus allowing for the eternity and deity of the Son without detracting from the monotheism which was universally regarded as the fundamental doctrine of Christianity as a body of theology. In this controversy the party of Alexander and Athanasius was animated, at least in the earlier stages of the controversy, not so much by speculative interests as by religious motives, the relation of Jesus to redemption, and they were strongly influenced by Irenæus. The party of Arius, on the other hand, was influenced by metaphysical interests as to the relation of being to creation and the contrast between the finite and the infinite. It may be said, in general, that until the council of Chalcedon, and possibly even after that, the main interest that kept alive theological discussion was intimately connected with vital problems of religious life of the times. After that the scholastic period began to set in and metaphysical discussions were based upon the formulæ of the councils. § 63. The Outbreak of the Arian Controversy and the Council of Nicæa, A. D. 325