But by Christianity the other world was lifted into such prominence as it had had in the life and thought of no people of antiquity except the Egyptians, and immortality was declared to be the destiny of every human soul. With the classical peoples it was the city which had been conceived as eternal. This transference of immortality from the city to the individual had vast import for morality.[627] What contributed to render it of such ethical importance was the fact that the after life was conceived as a life of rewards and punishments. A heaven of ineffable and everlasting bliss and a hell of unutterable and everlasting torment were laid open to the eyes of men, and became the tremendous sanctions of the new moral code promulgated by Christianity. It would be difficult to exaggerate the influence of this teaching upon the moral life of the European peoples, especially during the medieval centuries of faith. To make this life transitory, vain, and worthless, and life in another world the only real life, is to cause the transvaluation of all moral values, and to change fundamentally conceptions of what is rational and right in conduct. [Sidenote: The teaching of the sanctity of human life] Springing naturally from the foregoing conceptions of man’s origin and eternal destiny is the Christian doctrine of the sanctity of human life. In no respect do Christian teachings contrast more sharply with pagan conceptions than in this regard. In the Greco-Roman view value did not attach to man as man. To the Greek way of thinking it was the Greek freeman alone who possessed the full capacity for virtue and the rights of manhood. In the common Roman view only the Roman citizen was regarded as dowered with the full faculties and rights of a human being. The slave was looked upon and treated as belonging to an inferior order of existence. The Christian doctrine of man’s divine sonship and of his eternal destiny gave infinite worth to every human life, and, investing man as man with an inviolable sanctity, worked effectively in widening the range of the moral sympathies and in bringing within the scope of the moral law all classes and conditions of men. It checked infanticide, which in the pre-Christian world had been very generally practiced without the least moral scruple; it suppressed the gladiatorial games in which the lives of men were placed on a level with those of the wild beasts with which they fought; it helped to make suicide, which the Romans looked upon as a noble mode of departure from life, a crime; and contributed to mitigate the lot of the slave and finally to help lift him into freedom. [Sidenote: The dogma of the fall of man and hereditary guilt] The view of man’s moral nature taught by the Founder of Christianity was simple and natural. It is embodied in the parable of the prodigal son. Man may go wrong, but he has ever the capacity, and, when he comes to himself, the desire, to return to the right way.