“But if a man were to believe the command of the proconsul to be the command of the emperor, in scorning the command of the proconsul he would scorn the command of the emperor. In like manner if a man were to know that human reason was dictating something contrary to God's commandment, he would not be bound to abide by reason: but then reason would not be entirely erroneous. But when erring reason proposes something as being commanded by God, then to scorn the dictate of reason is to scorn the commandment of God.
Reply Obj. 3: Whenever reason apprehends something as evil, it apprehends it under some species of evil; for instance, as being something contrary to a divine precept, or as giving scandal, or for some such like reason.”