It may be that too much time has been spent upon speculations about Christianity, whether true or false, and that that which is essential consists not of speculations but of facts, and not in technical accuracy on questions of metaphysics, but in the attitude of mind in which we regard them. It would be a cold world in which no sun shone until the inhabitants thereof had arrived at a true chemical analysis of sunlight. And it may be that the knowledge and thought of our time, which is drawing us away from the speculative elements in religion to that conception of it which builds it upon the character and not only upon the intellect, is drawing us thereby to that conception of it which the life of Christ was intended to set forth, and which will yet regenerate the world. LECTURE XII. THE TRANSFORMATION OF THE BASIS OF CHRISTIAN UNION: DOCTRINE IN THE PLACE OF CONDUCT. I spoke in the last Lecture of the gradual formation under Greek influence of a body of doctrine. I propose to speak in the present Lecture of that enormous change in the Christian communities by which an assent to that body of doctrine became the basis of union. I shall have to speak less of the direct influence of Greece than in previous Lectures: but it is necessary to show not only the separate causes and the separate effects, but also their general sum in the changed basis of Christian communion. * * * * * There is no adequate evidence that, in the first age of Christianity, association was other than voluntary. It was profoundly individual. It assumed for the first time in human history the infinite worth of the individual soul. The ground of that individual worth was a divine sonship. And the sons of God were brethren. They were drawn together by the constraining force of love. But the clustering together under that constraining force was not necessarily the formation of an association. There was not necessarily any organization.[709] The tendency to organization came partly from the tendency of the Jewish colonies in the great cities of the empire to combine, and to a far greater extent from the large tendency of the Greek and Roman world to form societies for both religious and social purposes.