But the world dislikes a high-priest, and good people dislike a charlatan. And the consequence is that theology, ancient or modern, is attacked from two very different points of view, by those who look upon it as the antithesis of 'the simple Gospel,' and by those who approach it from the side of speculative thought. Theology claims to be a divine science. Religious people attack it because it is a science; philosophers because it claims to be divine. To the former, religion expressed in rational terms ceases to be religion; to the latter, that science is no science which claims for itself unique conditions. Yet S. Paul seems to recognise both the necessity and the uniqueness of theology when he says to the Greeks of Corinth, 'We received not the spirit of the world, but the spirit which is of God, that we might know the things that are freely given us by God.'
It is the relation of Christian theology to philosophy and science with which we are specially concerned. But it is impossible to pass by the objection to theology which comes as it were ab intra from the side of religion. For if it is valid, then Christianity may as well give up at once any idea of being the religion of man. Yet people say, 'Why have a theology? Human reason cannot search out "the deep things of God;" it will only put new difficulties in a brother's way; why not rest content with the words of Holy Scripture, with simple truths like "God is love," and simple duties like "Love one another," and leave theology alone?' Now without denying what George Eliot calls 'the right of the individual to general haziness,' or asserting that every Christian must be a theologian, we may surely say that Christianity is bound to have a theology. And even individual Christians, if they ever grow into the manhood of reason, must have a theology, or cease to be religious. The protest against theology from the side of religion looks modest and charitable enough till we remember that religious haziness is generally, if not always, the outcome of moral laziness; that it implies the neglect of a duty and the neglect of a gift;—the duty of realizing to the reason the revelation of Christ, and the gift of the Spirit of Truth to enable us to do it. More than this, the protest against theology in the interests of religion is irrational and suicidal. To tell a thinking man that he need not interpret to his reason what religion tells him of God, is like saying to him, 'Be religious if you will, but you need not let your religion influence your conduct.' If Christianity had been content to be a moral religion, if it had abandoned its claim to rationality and had left Greek speculation alone, it must have accepted either the Gnostic division of territory, or recognised an internecine conflict between religion and philosophy. And it did neither; but, under the guidance of the Spirit of Truth, Christian theology arose and claimed the reason of the ancient world.
Thus as the religion of the Old Testament claims morality for God, so Christianity goes further and claims to hold the key to the intellectual problems of the world. So far as the nature of God is concerned, Christianity met the intellectual difficulties of the first centuries by the Doctrine of the Trinity.
From time to time people make the discovery that the doctrine of the Trinity is older than Christianity. If the discoverer is a Christian apologist, he usually explains that God has given anticipatory revelations to men of old, and points out how they fall short of the revelation of Christianity. If he is an opponent of Christianity, he triumphantly claims to have unmasked the doctrine and tracked it down to a purely natural origin. 'People think,' says Hegel, 'that by pronouncing a doctrine to be Neo-Platonic, they have ipso facto banished it from Christianity[109].' Men have found the doctrine, or something like it, not only in the Old Testament but in Plato and Neo-Platonism, and among the Ophite Gnostics, in the Chinese Tao-Té-Ching and the 'Three Holy Ones' of Bouddhism, in the Tri-mûrti of Hinduism and elsewhere. Why not? Revelation never advances for itself the claim which its apologists sometimes make for it, the claim to be something absolutely new. A truth revealed by God is never a truth out of relation with previous thought. He leads men to feel their moral and intellectual needs before He satisfies either. There was a preparation for Hebrew monotheism, as there was a preparation for the Gospel of Christ. There was an intellectual preparation for the doctrine of the Trinity, as there was a moral preparation for the doctrine of the Incarnation. If the Christian doctrine of the Incarnation is distinguished from the avatars of Hinduism, and the incarnations of Thibetan Lamaism, by its regenerative moral force, the Christian doctrine of the Trinity is no less distinguished from the pseudo-trinities of Neo-Platonism and its modern developments by the fact that for eighteen centuries it has been the safeguard of a pure Monotheism against everything which menaces the life of religion.
But Christian theology is not 'a philosophy without assumptions.' It does not attempt to prove sola ratione the doctrine of the Trinity, but to shew how that which reason demands is met and satisfied by the Christian doctrine of God. Starting with the inheritance of faith, the belief in the Divinity of Christ, and trusting in the guidance of the Spirit of Truth, it throws itself boldly into the rational problem, fights its way through every form of Unitarianism, and interprets its faith to itself and to the world at large in the doctrine of the Triune God. Its charter is the formula of Baptism, where the 'treasures of immediate faith are gathered up into a sentence, though not yet formulated into a doctrine[110].'
To the Greek mind two things had become clear before Christianity came into the world, and it would be easy to trace the steps by which the conclusions were reached. First, Reason, as relation-giving, seeks for unity in the manifoldness of which it is conscious, and will be satisfied with nothing less. But Eleaticism had convincingly proved that an abstract unity can explain nothing. Quite apart from questions of religion and morals, the Eleatic unity was metaphysically a failure. Plato had seen this, and yet the 'dead hand' of Eleaticism rested on Platonism, and the dialogue Parmenides shewed how powerless the Doctrine of Ideas was to evade the difficulty. Thus the Greeks more than 2000 years ago had realized, what is nowadays proclaimed, as if it were a new discovery, that an absolute unit is unthinkable, because, as Plato puts it in the Philebus, the union of the one and the many is 'an everlasting quality in thought itself which never grows old in us.' The Greeks, like the Jews, had thus had their 'schoolmaster to bring them to Christ.' They had not solved, but they had felt, the rational difficulty; as the Jews had felt, but had not overcome, except through the Messianic hope, the separation of man from God. But as the Trinitarian doctrine took shape, Christian teachers realized how the Christian, as opposed to the Jewish, idea of God, not only held the truth of the Divine Unity as against all polytheistic religions, but claimed reason on its side against all Unitarian theories. They did not, however, argue that it was true because it satisfied reason, but that it satisfied reason because it was true.
They started, indeed, not with a metaphysical problem to be solved, but with a historical fact to proclaim, the fact of the Resurrection, and a doctrinal truth to maintain, the Divinity of Him who rose. And starting from that basis of fact revealed in Christ, they found themselves in possession of an answer to difficulties which at first they had not felt, and thus their belief was justified and verified in the speculative region.
The truth for which they contended, which was enshrined in their sacred writings, was that 'the Father is God, the Son is God, and the Holy Ghost is God. And yet they are not three Gods, but one God.' But the Fathers do not treat this doctrine merely as a revealed mystery, still less as something which complicates the simple teaching of Monotheism, but as the condition of rationally holding the Unity of God. 'The Unity which derives the Trinity out of its own self,' says Tertullian, 'so far from being destroyed, is actually supported by it[111].' 'We cannot otherwise think of One God,' says Hippolytus, 'but by truly believing in Father, and Son, and Holy Ghost[112].' 'The supreme and only God,' says Lactantius, 'cannot be worshipped except through the Son. He who thinks that he worships the Father only, in that he does not worship the Son also, does not worship the Father[113]. 'Without the Son the Father is not,' says Clement of Alexandria, 'for in that He is a Father He is the Father of the Son, and the Son is the true teacher about the Father[114].' So Origen argues,—If God had ever existed alone in simple unity and solitary grandeur, apart from some object upon which from all eternity to pour forth His love, He could not have been always God. His love, His Fatherhood, His very omnipotence would have been added in time, and there would then have been a time when He was imperfect. 'The Fatherhood of God must be coeval with His omnipotence; for it is through the Son that the Father is Almighty[115].' This was the line of argument afterwards developed by S. Athanasius when he contended against the Arians that the Son was the reality or truth[116] of the Father, without whom the Father could not exist; and by S. Augustine, when he argues that love implies one who loves and one who is loved, and love to bind them together[117]. Even one so unphilosophically minded as Irenaeus[118], cannot but see in the Christian doctrine of the relation of the Father and the Son, the solution of the difficulty about the infinity of God: 'Immensus Pater in Filio mensuratus; mensura Patris Filius.' While philosophy with increasing hopelessness was asking, How can we have a real unity which shall be not a barren and dead unity, but shall include differences? Christianity, with its doctrine of God, was arguing that that which was an unsolved contradiction for non-Christian thought, was a necessary corollary of the Christian Faith[119].
The other truth which Greek thought had realized was the immanence of reason in nature and in man. When Anaxagoras first declared that the universe was the work of intelligence, we are told that he seemed 'like a sober man amongst random talkers.' But both Plato and Aristotle accuse him of losing the truth which he had gained because he made intelligence appear only on occasions in the world, dragged in, like a stage-god, when naturalistic explanations failed[120]. The conception of creation out of nothing was of course unknown to Anaxagoras. Intelligence is only the arranger of materials already given in a chaotic condition. With Aristotle too it is reason which makes everything what it is. But the reason is in things, not outside them. Nature is rational from end to end. In spite of failures and mistakes, due to her materials, nature does the best she can and always aims at a good end[121]. She works like an artist with an ideal in view[122]. Only there is this marked difference,—Nature has the principle of growth within herself, while the artist is external to his materials[123]. Here we have a clear and consistent statement of the doctrine of immanent reason as against the Anaxagorean doctrine of a transcendent intelligence. If we translate both into the theological language of our own day, we should call the latter the deistic, the former the pantheistic, view; or, adopting a distinction of supreme importance in the history of science, we might say that we have here, face to face, the mechanical and the organic view of nature. Both were teleological, but to the one, reason was an extra-mundane cause, to the other, an internal principle. It was the contrast between external and inner design, as we know it in Kant and Hegel; between the teleology of Paley and the 'wider teleology' of Darwin and Huxley and Fiske; between the transcendent and immanent views of God, when so held as to be mutually exclusive.
It is these two one-sided views which the Christian doctrine of God brings together. Religion demands as the very condition of its existence a God who transcends the universe; philosophy as imperiously requires His immanence in nature. If either Religion denies God's immanence, or Philosophy denies that He transcends the universe, there is an absolute antagonism between the two, which can only be ended by the abandonment of one or the other. But what we find is that though Philosophy (meaning by that the exercise of the speculative reason in abstraction from morals and religion) the more fully it realizes the immanence of God, the more it tends to deny the transcendence, religion not only has no quarrel with the doctrine of immanence, but the higher the religion the more unreservedly it asserts this immanence as a truth dear to religion itself. The religious equivalent for 'immanence' is 'omnipresence,' and the omnipresence of God is a corollary of a true monotheism. As long as any remains of dualism exist, there is a region, however small, impervious to the Divine power. But the Old Testament doctrine of creation, by excluding dualism, implies from the first, if it does not teach, the omnipresence of God. For the omnipotence of God underlies the doctrine of creation, and omnipotence involves omnipresence. Hence we find the Psalmists and Prophets ascribing natural processes immediately to God. They know nothing of second causes. The main outlines of natural science, the facts of generation and growth, are familiar enough to them, yet every fact is ascribed immediately to the action of God. He makes the grass to grow upon the mountains; He fashions the child in the womb; He feeds the young ravens; He provides fodder for the cattle; He gives to all their meat in due season; when He lets His breath go forth they are made; when He takes away their breath they die and return to dust.