“Some also question whether angels are personal beings, and whether matter and spirit differ essentially. Others destroy the gratuity of the supernatural order, since God, they say, cannot create intellectual beings without ordering and calling them to the beatific vision. Nor is this all. Disregarding the Council of Trent, some pervert the very concept of original sin, along with the concept of sin in general as an offense against God, as well as the idea of satisfaction performed for us by Christ. Some even say that the doctrine of transubstantiation, based on an antiquated philosophic notion of substance, should be so modified that the real presence of Christ in the Holy Eucharist be reduced to a kind of symbolism, whereby the consecrated species would be merely efficacious signs of the spiritual presence of Christ and of His intimate union with the faithful members of His Mystical Body.”  Pope Pius XII, Humani Generis, Par. 26: