ABANDONING GOD IS A MORAL CHOICE.
Since, therefore, history is clear that those who killed Christ were the children of those who did these things,[1] the question occurs as to how they are called children of perdition, in opposition to those who wish to be of a different nature. The former are evil and lost, unable to be saved, whereas the latter are good, unable to perish. For if, as they think, the children of perdition are worse by nature, how is it possible that one of them could be found who was previously lost? In the parable of the prodigal, moreover, both the one sheep lost out of one hundred and the one silver coin lost out of ten were found again, as was the son, about whom the father said to his elder brother: This your brother was lost and is found again; he was dead, and now he lives![2] For no one perishes unless previously healthy, and no one dies unless previously alive. Therefore, those who are now called children of perdition, or children of iniquity and crime, have failed the Lord by their own fault and thus began to be children of perdition when they were still children of the Lord, as the prophet says to these very people: You failed the Lord and provoked the holy One of Israel to wrath.[3] We can receive this, according to the tropological sense, as applying to heretics who are children of perdition and the seed of the worst, or liars. For they were liars from the beginning, just like the devil, who is the father of their lie and the father of every lie.[4] . . . Nor is there any doubt but that such children of perdition and wicked seed will themselves have many children whom they will deceive and murder in deep valleys and in the abyss of impiety, under overhanging rocks that continuously threaten destruction, rocks that are called many on account of the diversity of their lies and the variety of their false doctrines. We, by contrast, have one Rock that the people of God continuously follow and from which the people of Israel formerly drank, when they enjoyed familiarity with the Lord.[5]
Commentary on Isaiah 16.3