I know, dearly beloved, that some may be moved, as the godly to inquire into the meaning of, and the ungodly to find fault with, the statement, that it was after the Lord had given the bread, that had been dipped, to His betrayer that Satan entered into him. For so it is written: "And when He had dipped the bread, He gave it to Judas Iscariot, the Son of Simon. And after the bread, then entered Satan into him." For they say, Was this the worth of Christ's bread, given from Christ's own table, that after it Satan should enter into His disciple? And the answer we give them is, that thereby we are taught rather how much we need to beware of receiving what is good in a sinful spirit. For the point of special importance is, not the thing that is received, but the person that receives it; and not the character of the thing that is given, but of him to whom it is given. For even good things are hurtful, and evil things are beneficial, according to the character of the recipients.
Augustine, Tractate 62 on John.
