It has ever been seen that men in general have resorted to outward forms for the expression of their religion: sound piety, that is to say, light and virtue, has never been the portion of the many. One should not wonder at this, nothing is so much in accord with human weakness. We are impressed by what is outward, while the inner essence of things requires consideration of such a kind as few persons are fitted to give. As true piety consists in principles and practice, the outward forms of religion imitate these, and are of two kinds: the one kind consists in ceremonial practices, and the other in the formularies of belief. Ceremonies resemble virtuous actions, and formularies are like shadows of the truth and approach, more or less, the true light. All these outward forms would be commendable if those who invented them had rendered them appropriate to maintain and to express that which they imitate—if religious ceremonies, ecclesiastical discipline, the rules of communities, human laws were always like a hedge round the divine law, to withdraw us from any approach to vice, to inure us to the good and to make us familiar with virtue. That was the aim of Moses and of other good lawgivers, of the wise men who founded religious orders, and above all of Jesus Christ, divine founder of the purest and most enlightened religion. It is just the same with the formularies of belief: they would be valid provided there were nothing in them inconsistent with truth unto salvation, even though the full truth concerned were not there. But it happens only too often that religion is choked in ceremonial, and that the divine light is obscured by the opinions of men.
The pagans, who inhabited the earth before Christianity was founded, had only one kind of outward form: they had ceremonies in their worship, but they had no articles of faith and had never dreamed of drawing up formularies for their dogmatic theology. They knew not whether their gods were real persons or symbols of the forces of Nature, as the sun, the planets, the elements. Their mysteries consisted not in difficult dogmas but in certain secret observances, whence the profane, namely those who were not initiated, were excluded. These observances were very often ridiculous and absurd, and it was necessary to conceal them in order to guard them against contempt. The pagans had their superstitions: they boasted of miracles, everything with them was full of oracles, auguries, portents, divinations; the priests invented signs of the anger or of the goodness of the gods, whose interpreters they claimed to be. This tended to sway minds through fear and hope concerning human events; but the great future of another life was scarce envisaged; one did not trouble to impart to men true notions of God and of the soul.
Of all ancient peoples, it appears that the Hebrews alone had public dogmas for their religion. Abraham and Moses established the belief in one God, source of all good, author of all things. The Hebrews speak of him in a manner worthy of the Supreme Substance; and one wonders at seeing the inhabitants of one small region of the earth more enlightened than the rest of the human race. Peradventure the wise men of other nations have sometimes said the same, but they have not had the good fortune to find a sufficient following and to convert the dogma into law. Nevertheless Moses had not inserted in his laws the doctrine of the immortality of souls: it was consistent with his ideas, it was taught by oral tradition; but it was not proclaimed for popular acceptance until Jesus Christ lifted the veil, and, without having force in his hand, taught with all the force of a lawgiver that immortal souls pass into another life, wherein they shall receive the wages of their deeds. Moses had already expressed the beautiful conceptions of the greatness and the goodness of God, whereto many civilized peoples to-day assent; but Jesus Christ demonstrated fully the results of these ideas, proclaiming that divine goodness and justice are shown forth to perfection in God’s designs for the souls of men.
I refrain from considering here the other points of the Christian doctrine, and I will show only how Jesus Christ brought about the conversion of natural religion into law, and gained for it the authority of a public dogma. He alone did that which so many philosophers had endeavoured in vain to do; and Christians having at last gained the upper hand in the Roman Empire, the master of the greater part of the known earth, the religion of the wise men became that of the nations. Later also Mahomet showed no divergence from the great dogmas of natural theology: his followers spread them abroad even among the most remote races of Asia and of Africa, whither Christianity had not been carried; and they abolished in many countries heathen superstitions which were contrary to the true doctrine of the unity of God and the immortality of souls.
It is clear that Jesus Christ, completing what Moses had begun, wished that the Divinity should be the object not only of our fear and veneration but also of our love and devotion. Thus he made men happy by anticipation, and gave them here on earth a foretaste of future felicity. For there is nothing so agreeable as loving that which is worthy of love. Love is that mental state which makes us take pleasure in the perfections of the object of our love, and there is nothing more perfect than God, nor any greater delight than in him. To love him it suffices to contemplate his perfections, a thing easy indeed, because we find the ideas of these within ourselves. The perfections of God are those of our souls, but he possesses them in boundless measure; he is an Ocean, whereof to us only drops have been granted; there is in us some power, some knowledge, some goodness, but in God they are all in their entirety. Order, proportions, harmony delight us; painting and music are samples of these: God is all order; he always keeps truth of proportions, he makes universal harmony; all beauty is an effusion of his rays.