This idea of the kingdom of heaven, so central in Christianity, is also the essential motive in the religion of Zoroaster. As, in the Zend Avesta, every man is a soldier, fighting for light or for darkness, and neutrality is impossible; so, in the Gospel, light and good stand opposed to darkness and evil as perpetual foes. A certain current of dualism runs through the Christian Scriptures and the teaching of the Church. God and Satan, heaven and hell, are the only alternatives. Every one must choose between them. In the current theology, this dualism has been so emphasized as even to exceed that of the Zend Avesta. The doctrine of everlasting punishment and an everlasting hell has always been the orthodox doctrine in Christianity, while the Zend Avesta probably, and the religion in its subsequent development certainly, teaches universal restoration, and the ultimate triumph of good over evil. Nevertheless, practically, in consequence of the greater richness and fulness of Christianity, this tendency to dualism has been neutralized by its monotheism, and evil kept subordinate; while, in the Zend religion, the evil principle assumed such proportions as to make it the formidable rival of good in the mind of the worshipper. Here, as before, we may say that Christianity is able to do justice to all the truth involved in the doctrine of evil, avoiding any superficial optimism, and recognizing the fact that all true life must partake of the nature of a battle.
The positive side of Egyptian religion we saw to be a recognition of the divine element in nature, of that plastic, mysterious life which embodies itself in all organisms. Of this view we find little stated explicitly in the New Testament. But that the principles of Christianity contain it, implicitly, in an undeveloped form, appears, (1.) Because Christian monotheism differs from Jewish and Mohammedan monotheism, in recognizing God "in all things" as well as God "above all things." (2.) Because Christian art and literature differ from classic art and literature in the romantic element, which is exactly the sense of this mysterious life in nature. The classic artist is a ποιητής, a maker; the romantic artist is a troubadour, a finder. The one does his work in giving form to a dead material; the other, by seeking for its hidden life. (3.) Because modern science is invention, i.e. finding. It recognizes mysteries in nature which are to be searched into, and this search becomes a serious religious interest with all truly scientific men. It appears to such men a profanity to doubt or question the revelations of nature, and they believe in its infallible inspiration quite as much as the dogmatist believes in the infallible inspiration of Scripture, or the churchman in the infallible inspiration of the Church. We may, therefore, say, that the essential truth in the Egyptian system has been taken up into our modern Christian life.
And how is it, lastly, with that opposite pole of religious thought which blossomed out in "the fair humanities of old religion" in the wonderful Hellenic mind? The gods of Greece were men. They were not abstract ideas, concealing natural powers and laws. They were open as sunshine, bright as noon, a fair company of men and women idealized and gracious, just a little way off, a little way up. It was humanity projected upon the skies, divine creatures of more than mortal beauty, but thrilling with human life and human sympathies. Has Christianity anything to offer in the place of this charming system of human gods and goddesses?
We answer that the fundamental doctrine of Christianity is the incarnation, the word made flesh. It is God revealed in man. Under some doctrinal type this has always been believed. The common Trinitarian doctrine states it in a somewhat crude and illogical form. Yet somehow the man Christ Jesus has always been seen to be the best revelation of God. But unless there were some human element in the Deity, he could not reveal himself so in a human life. The doctrine of the incarnation, therefore, repeats the Mosaic statement that "man was made in the image of God." Jewish and Mohammedan monotheism separate God entirely from the world. Philosophic monotheism, in our day, separates God from man, by teaching that there is nothing in common between the two by which God can be mediated, and so makes him wholly incomprehensible. Christianity gives us Emmanuel, God with us, equally removed from the stern despotic omnipotence of the Semitic monotheism and the finite and imperfect humanities of Olympus. We see God in Christ, as full of sympathy with man, God "in us all"; and yet we see him in nature, providence, history, as "above all" and "through all." The Roman Catholic Church has, perhaps, humanized religion too far. For every god and goddess of Greece she has given us, on some immortal canvas, an archangel or a saint to be adored and loved. Instead of Apollo and the Python we have Guido's St. Michael and the Dragon; in place of the light, airy Mercury she provides a St. Sebastian; instead of the "untouched" Diana, some heavenly Agnes or Cecilia. The Catholic heaven is peopled, all the way up, with beautiful human forms; and on the upper throne we have holiness and tenderness incarnate in the queen of heaven and her divine Son. All the Greek humanities are thus fulfilled in the ample faith of Christendom.
By such a critical survey as we have thus sketched in mere outline it will be seen that each of the great ethnic religions is full on one side, but empty on the other, while Christianity is full all round. Christianity is adapted to take their place, not because they are false, but because they are true as far as they go. They "know in part and prophesy in part; but when that which is perfect is come, then that which is in part shall be done away."
§ 8. Comparative Theology will probably show that Ethnic Religions are arrested, or degenerate, and will come to an End, while the Catholic Religion is capable of a progressive Development.
The religions of Persia, Egypt, Greece, Rome, have come to an end; having shared the fate of the national civilization of which each was a part. The religions of China, Islam, Buddha, and Judæa have all been arrested, and remain unchanged and seemingly unchangeable. Like great vessels anchored in a stream, the current of time flows past them, and each year they are further behind the spirit of the age, and less in harmony with its demands. Christianity alone, of all human religions, seems to possess the power of keeping abreast with the advancing civilization of the world. As the child's soul grows with his body, so that when he becomes a man it is a man's soul and not a child's, so the Gospel of Jesus continues the soul of all human culture. It continually drops its old forms and takes new ones. It passed out of its Jewish body under the guidance of Paul. In a speculative age it unfolded into creeds and systems. In a worshipping age it developed ceremonies and a ritual. When the fall of Rome left Europe without unity or centre, it gave it an organization and order through the Papacy. When the Papacy became a tyranny, and the Renaissance called for free thought, it suddenly put forth Protestantism, as the tree by the water-side sends forth its shoots in due season. Protestantism, free as air, opens out into the various sects, each taking hold of some human need; Lutheranism, Calvinism, Methodism, Swedenborgianism, or Rationalism. Christianity blossoms out into modern science, literature, art,—children who indeed often forget their mother, and are ignorant of their source, but which are still fed from her breasts and partake of her life. Christianity, the spirit of faith, hope, and love, is the deep fountain of modern civilization. Its inventions are for the many, not for the few. Its science is not hoarded, but diffused. It elevates the masses, who everywhere else have been trampled down. The friend of the people, it tends to free schools, a free press, a free government, the abolition of slavery, war, vice, and the melioration of society. We cannot, indeed, here prove that Christianity is the cause of these features peculiar to modern life; but we find it everywhere associated with them, and so we can say that it only, of all the religions of mankind, has been capable of accompanying man in his progress from evil to good, from good to better.
We have merely suggested some of the results to which the study of Comparative Theology may lead us. They will appear more fully as we proceed in our examination of the religions, and subsequently in their comparison. This introductory chapter has been designed as a sketch of the course which the work will take. When we have completed our survey, the results to which we hope to arrive will be these, if we succeed in what we have undertaken:—
1. All the great religions of the world, except Christianity and Mohammedanism, are ethnic religions, or religions limited to a single nation or race. Christianity alone (including Mohammedanism and Judaism, which are its temporary and local forms) is the religion of all races.
2. Every ethnic religion has its positive and negative side. Its positive side is that which holds some vital truth; its negative side is the absence of some other essential truth. Every such religion is true and providential, but each limited and imperfect.