They failed entirely in the union of three things,(474) a dogma and a morality founded on that dogma, both of which should be exhibited, brought before the eyes and worked into the hearts of men by a corresponding worship. To unite these three things was needed an authority of which above all they were destitute. Their dogma was without the principle of faith; their morality without binding power; but the worship which should blend the two they had not at all. And so they presented no semblance of the society which should carry these three things in its bosom, and they could not in the least satisfy the doubts or the yearnings which they had raised. But the period beginning with the rise of Greek philosophy and ending with the principate of Claudius will ever remain of the highest interest and importance as showing what human reason, putting forth its highest powers in the race in which it culminated, but at the same time more thoroughly separated from belief, tradition, and authority than anywhere else, did actually achieve. It is in this respect that the heathen philosophers, together with the poets and historians who precede the publication of the Christian religion in the Roman world, possess a value far beyond any intrinsic merit of their own. It is a study of pathology the results of which are far as yet from being gathered in. It is only by carefully examining what the philosophers taught in theology and morals—for they aspired to be and were both the theologians and the moralists of those ages—that we can at all form an adequate judgment of the real work which the Christian Church has wrought in the world. It is only by using the historians and poets as a mirror of that general society to whose cultured classes the philosophers spoke, that we can estimate what the great mass of mankind then was, and what effect the philosophers produced on them. The difference between their world and their society and ours is the measure of Christian work. The hundred years preceding Claudius, which include in them almost all the greatest names of Roman literature, are the most important of all in this point of view, both as containing the result of scientific thought in the five preceding centuries, and as giving the depth of the moral and intellectual descent. We learn from this whole long period the fulness of the truth conveyed in those words of the angelic doctor at the commencement of his great work: “Even for those things which can be investigated concerning God by the force of human reason, it was necessary for man to be instructed by a divine revelation, because few only, and they after long inquiries, and with the admixture of many errors, would convey to man the truth concerning God as searched out by reason.”(475)