That the soul sinned in its pre-existent state and on that account was incarcerated in the body is regarded by the Catholic Church regards as a fiction that has been repeatedly condemned. Divested of that fiction, the theory that the soul exists prior to its infusion into the organism, while not explicitly reprobated, is obviously opposed to the doctrine of the Catholic Church according to which souls are multiplied correspondingly with the multiplication of human organisms. However, whether the rational soul is infused into the organism at conception, as the modern opinion holds, or some weeks subsequently, as medieval scholastics supposed, is an open question to some theologians.