Like many of the Church Fathers the Cabalists used as their main argument in favor of the doctrine of metempsychosis the justice of God. But for the belief in metempsychosis, they maintained, the question why God often permits the wicked to lead a happy life while many righteous are miserable would be unanswerable. Then too the infliction of pain upon children would be an act of cruelty unless it is imposed in punishment of sin committed by the soul in a previous state. Isaac Abravanel sees in the commandment of the Levirate a proof of the doctrine of metempsychosis for which he gives the following reasons: (1) God in His mercy willed that another trial should be given to the soul, which having yielded to the sanguine temperament of the body had committed a capital sin, such as murder, adultery, etc.; (2) it is only just that when a man dies young a chance should be given to his soul to execute in another body the good deeds which it had not time to perform in the first body; (3) the soul of the wicked sometimes passes into another body in order to receive its deserved punishment here below instead of in the other world where it would be much more severe. (Commentary on Deuteronomy, XXV, 5.)
Christianity is not exempt from this idea. Origen and other Church Fathers believed in it. Origen says: "For God, justly disposing of his creatures according to their desert, united the diversities of minds in one congruous world, that he might, as it were, adorn his mansion (in which ought to be not only vases of gold and silver, but of wood also and clay, and some to honor and some to dishonor) with these diverse vases, minds or souls. To these causes the world owes its diversity, while Divine Providence disposes each according to his tendency, mind and disposition." He also says: "I think this is a question how it happens that the human mind is influenced now by the good, now by the evil. The causes of this I suspect to be more ancient than this corporeal birth." The idea of Reincarnation spread so fast amongst the early Christians that Justinian was obliged to suppress it by passing a law in the Council of Constantinople in 538 A.D. The law was this: "Whoever shall support the mythical presentation of the pre-existence of the soul, and the consequently wonderful opinion of its return, let him be Anathema." The Gnostics and Manichaeans propagated the tenets of Reincarnation amongst the mediaeval sects such as the Bogomiles and Paulicians. Some of the followers of this so-called erroneous belief were cruelly persecuted in 385 A.D.