This doctrine of the omnipresence of God, as conceived by religion, had however yet to be fused with the philosophical doctrine of immanence. And here again the fusion was effected by the Christian doctrine of God, as Trinity in Unity. The earlier Apologists concern themselves first with the vindication of the Divine attributes. God's separateness from the world as against Greek Pantheism, His omnipresence in it as against a Judaising deism. But the union of God's transcendence with His immanence, and with it the fusion of the religious with the philosophic idea of God, is only consciously completed by the Doctrine of the Trinity[124]. The dying words of Plotinus, expressing as they did the problem of his life, are said to have been,--'I am striving to bring the God which is within into harmony with the God which is in the universe.' And the unsolved problem of Neo-Platonism, which is also the unsolved problem of non-Christian philosophy in our day, is met by the Christian doctrine of God. All and more than all that philosophy and science can demand, as to the immanence of reason in the universe, and the rational coherence of all its parts, is included in the Christian teaching: nothing which religion requires as to God's separateness from the world, which He has made, is left unsatisfied. The old familiar Greek term ΛΟΓΟΣ which, from the days of Heracleitus, had meant to the Greek the rational unity and balance of the world, is taken up by S. John, by S. Clement, by S. Athanasius, and given a meaning which those who started from the Philonian position never reached. It is the personal Word, God of God, the Only Begotten of the Father, who is one in the Holy Spirit with the Father. 'The Word was God.' 'By Him all things were made.' 'He the All-powerful, All-holy Word of the Father spreads His power over all things everywhere, enlightening things seen and unseen, holding and binding all together in Himself. Nothing is left empty of His presence, but to all things and through all, severally and collectively, He is the giver and sustainer of life.... He, the Wisdom of God, holds the universe like a lute, and keeps all things in earth and air and heaven in tune together. He it is Who binding all with each, and ordering all things by His will and pleasure, produces the perfect unity of nature, and the harmonious reign of law. While He abides unmoved for ever with the Father, He yet moves all things by His own appointment according to the Father's will[125].' The unity of nature is, thus, no longer the abstract motionless simplicity of Being, which had been so powerless to explain the metaphysical problems of Greece. It is the living Omnipresent Word, coeternal and consubstantial with the Father, and the philosophical truth becomes an integral part of that Christian doctrine of God, which, while it safeguarded religion and satisfied reason, had won its first and greatest victories in the field of morals.