86. The first difficulty is how the soul could be infected with original sin, which is the root of actual sins, without injustice on God's part in exposing the soul thereto. This difficulty has given rise to three opinions on the origin of the soul itself. The first is that of the _pre-existence of human souls_ in another world or in another life, where they had sinned and on that account had been condemned to this prison of the human body, an opinion of the Platonists which is attributed to Origen and which even to-day finds adherents. Henry More, an English scholar, advocated something like this dogma in a book written with that express purpose. Some of those who affirm this pre-existence have gone as far as metempsychosis. The younger van Helmont held this opinion, and the ingenious author of some metaphysical _Meditations_, published in 1678 under the name of William Wander, appears to have some leaning towards it. The second opinion is that of _Traduction_, as if the soul of children were engendered (_per traducem_) from the soul or souls of those from whom the body is engendered. St. Augustine inclined to this judgement the better to explain original sin. This doctrine is taught also by most of the theologians of the Augsburg Confession. Nevertheless it is not completely established among them, since the Universities of Jena and Helmstedt, and others besides, have long been opposed to it. The third opinion, and that most widely accepted to-day, is that of _Creation_: it is taught in the majority of the Christian Schools, but it is fraught with the greatest difficulty in respect of original sin.