The Persians believed in the doctrine of hell for the wicked, and of paradise for the good; but held that all the wicked would eventually be purified by fire. It was thought that the fires were hot enough to purify the most abominable soul in about three days.

Herodotus tells us that the Egyptians were the first to defend the doctrine of the immortality of the soul, and he says that they believed in its transmigration through various animal bodies for a period of three thousand years before its return to a human body.

Of the Grecian schools, the Pythagoreans held that the soul is eternal,—that is, uncreated and indestructible; that no real entity is either made or destroyed. The Eleatics held practically the same doctrine. The Ionics taught that the soul was reabsorbed into the Divine reason. The Stoics believed in the periodical destruction of all things by fire, when the good will be absorbed and the wicked perish. The Epicurean faith was well described by Paul in the phrase, "Let us eat and drink, for to-morrow we die." The Pyrrhonists were the sceptics of the age, and doubted everything. Socrates taught the doctrine of immortality for the good, the virtuous, and the wise. The incurably bad are "hurled into Tartarus, whence they never come forth;" whilst those who can be cured are subjected to needful punishments before being admitted into the mansions of the blest. Plato was a Pythagorean, with certain bizarre notions of his own, such as the migration of souls through various brute and human forms; and he believed that even the duration of divine work is limited.

It will thus be seen that when Jesus appeared on earth he found the philosophy of the soul in a very chaotic state. It was his mission to bring order out of chaos, and to proclaim the true philosophy; to declare the conditions of immortality, and point the way to eternal happiness. That he simplified the doctrine of immortality into a system so plain that "the wayfaring man, though a fool, need not err therein," no one will deny. Its grand simplicity, when placed in contrast with the complicated doctrines of all other systems of religious philosophy, ancient or modern, places upon it the stamp of inherent probability; for scientific truth is always simple and free from complication. It was Jesus who gave the doctrine of immortality a distinct and definite form and a permanent place in the philosophy of the civilized world. It was he who first proclaimed the fundamental law underlying the science of the soul. It was from his words, spoken to a few humble followers in an obscure corner of the earth, that the doctrine has spread throughout all the civilized world. From the centres of civilization the Church has sent its missionaries, its representatives of the Master, among all peoples, civilized and savage, preaching the gospel of immortality to all mankind. Its influence is not confined to those who believe in the tenets of the Christian Church, nor even to those who have heard the name of Christ. It has spread, through some subtle, unseen power and potency, until it permeates every fibre of human society, and constitutes the promise of every religion, the hope of all humanity.

I have, in other chapters, pointed out some of the proofs which science affords of the doctrine of immortality, and of the verity of the history of Jesus of Nazareth. I have shown that every known fact which bears upon the subject points to the continued life of the soul after the death of the body. I have shown that the discoveries of modern science demonstrate the fact that Jesus was in possession of a complete knowledge of the science of the soul in its relations to its physical environment. I have shown that all known facts bearing upon the subject go to prove that he also had a knowledge of its laws in its relations to a purely spiritual existence.

We have then, first, an array of demonstrable facts which irresistibly lead to the conclusion that the soul survives the body; secondly, another array of facts which prove that it was possible for an exceptionally endowed person to perceive the laws of the soul; thirdly, an array of facts which demonstrate that Jesus did understand those laws as far as they pertain to the soul's relations to the physical man; fourthly, we have facts which show that he understood the laws of the soul in its relations to the spiritual world, and the essential conditions of its conscious existence after the death of the body; and fifthly, we have in the New Testament a record of the acts which demonstrated his knowledge of the subject, as well as of his solemn and repeated declarations of the laws which pertain to that subject.

When we consider together all these cumulative proofs, it may safely be said that there are few principles of nature that are more clearly established by inductive processes of reasoning than is the principle of immortality.

Having established this proposition, it remains only to consider Christ's doctrine of future rewards and punishments. Obviously, this is a more difficult question to handle, for the reason that there are necessarily few facts known to mankind which can be considered scientifically demonstrative of any proposition which has been made by any one on that subject. Nevertheless, if there is one known fact which confirms his declarations on that question, and at the same time satisfies the demands of human reason and the common sense of Divine Justice, we may safely conclude that the Christian religion rests upon a purely scientific basis.

The first important fact which confronts us in considering this branch of the subject is, that Jesus said very little on the subject. It was obviously impossible for him to convey to the human mind any adequate knowledge or idea of the actual conditions of a spiritual existence. He was hedged about by the limitations of human speech and the finite understanding of his followers. His descriptions, therefore, of the places of future rewards and punishments were necessarily limited to material conceptions. He could effectively employ no other symbolism than that with which his hearers were familiar and which they could appreciate. He had taught them in plain and unmistakable terms the conditions upon which the soul could attain a conscious existence; and having done that, his mission was thenceforth a moral one. Having taught them how to attain eternal life, he taught them so to conduct their lives in this world as to entitle them to the joys of that life. It was no part of his mission to reconstruct the accepted geography of the world of spirits, for it could only add confusion to their crude conceptions. His parables were drawn from the objects and incidents of their every-day life, and were necessarily limited in their application to a spiritual existence. His only object was to enforce a code of morals founded upon the eternal principles of right and justice, simple in terms, and adapted to their comprehension, but grand in its simplicity, and adapted to the varying conditions of human society for all time.