posed real classes of men. The doctrine of the four temperaments and the Stoic ideal of the Wise Man afford a parallel for the personification of abstract qualities. The true genius of Christianity, expressed by the Fathers of the early centuries, rejected Gnosticism. The ascription to a creature of an absolutely spiritual nature, and the claim to endless existence asserted as a strictly de jure privilege in the case of the "perfect", seemed to them an encroachment on the incommunicable attributes of God. The theory of Emanation too was seen to be a derogation from the dignity of the Divine nature For this reason, St. Justin, supposing that the doctrine of natural immortality logically implies eternal existence, rejects it, making this attribute (like Plato in the "Timaeus") dependent on the free will of God; at the same time he plainly asserts the de facto immortality of every human soul. The doctrine of conservation, as the necessary complement of creation, was not yet elaborated. Even in Scholastic philosophy, which asserts natural immortality, the abstract possibility of annihilation through an act of God's absolute power is also admitted. Similarly, Tatian denies the simplicity of the soul, claiming that absolute simplicity belongs to God alone. All other beings, he held, are composed of matter and spirit. Here again it would be rash to urge a charge of Materialism. Many of these writers failed to distinguish between corporeity in strict essence and corporeity as a necessary or natural concomitant. Thus the soul may itself be incorporeal and yet require a body as a condition of its existence. In this sense St. Irenaeus attributes a certa...