But the interest attaching to the _City of God_ is not merely historical. It is the earnestness and ability with which he developes his own philosophical and theological views which gradually fascinate the reader, and make him see why the world has set this among the few greatest books of all time. The fundamental lines of the Augustinian theology are here laid down in a comprehensive and interesting form. Never was thought so abstract expressed in language so popular. He handles metaphysical problems with the unembarrassed ease of Plato, with all Cicero's accuracy and acuteness, and more than Cicero's profundity. He is never more at home than when exposing the incompetency of Neoplatonism, or demonstrating the harmony of Christian doctrine and true philosophy. And though there are in the _City of God_, as in all ancient books, things that seem to us childish and barren, there are also the most surprising anticipations of modern speculation. There is an earnest grappling with those problems which are continually re-opened because they underlie man's relation to God and the spiritual world,--the problems which are not peculiar to any one century. As we read these animated discussions, "The fourteen centuries fall away Between us and the Afric saint, And at his side we urge, to-day, The immemorial quest and old complaint. No outward sign to us is given, From sea or earth comes no reply; Hushed as the warm Numidian heaven He vainly questioned bends our frozen sky." It is true, the style of the book is not all that could be desired: there are passages which can possess an interest only to the antiquarian; there are others with nothing to redeem them but the glow of their eloquence; there are many repetitions; there is an occasional use of arguments "plus ingenieux que solides," as M. Saisset says. Augustine's great admirer, Erasmus, does not scruple to call him a writer "obscuræ subtilitatis et parum amœnæ prolixitatis;"[21] but "the toil of penetrating the apparent obscurities will be rewarded by finding a real wealth of insight and enlightenment." Some who have read the opening chapters of the _City of God_, may have considered it would be a waste of time to proceed; but no one, we are persuaded, ever regretted reading it all. The book has its faults; but it effectually introduces us to the most influential of theologians, and the greatest popular teacher; to a genius that cannot nod for many lines together; to a reasoner whose dialectic is more formidable, more keen and sifting, than that of Socrates or Aquinas; to a saint whose ardent and genuine devotional feeling bursts up through the severest argumentation; to a man whose kindliness and wit, universal sympathies and breadth of intelligence, lend piquancy and vitality to the most abstract dissertation.