Augustine of Hippo : The good baptized the evil, as Simon Magus was baptized by Philip, a holy man. These four types, therefore, my brothers, are well known. Look, I repeat them again. Hold fast to them, count them, pay attention to them. Beware those types which are evil; hold fast to those which are good. The good are born from the good when holy people are baptized by holy people; the evil from the evil when both they who baptize and they who are baptized live wickedly and impiously; the good from the evil when they who baptize are evil and they who are baptized are good; and the evil from the good when they who baptize are good and they who are baptized are evil. — TRACTATES ON THE GOSPEL OF John 11.9.1-2 Bede : Then Simon himself also believed. Either he truly believed in the Lord, having been overcome by the words and virtue of the blessed Philip, or, as it is more credible, he pretended to believe until he received baptism, so that, because he was very eager for praise, in such a way that he wanted to be considered the Christ, as the stories tell, he might learn from Him the arts by which he performed miracles. This is also said to have been done by his successors, who, initiated in their author's malevolent arts, customarily entered the Church by any deceit and secretly acquired baptism. — Commentary on Acts Oecumenius : Thus Simon, although he was a magician and flattered the apostles, and although, like others, he had been baptized by Philip, who was one of the seven, he nevertheless did not receive the Holy Spirit through the laying on of the apostles' hands. What then? Did those baptized by Philip not receive the Holy Spirit? They received the Holy Spirit of remission, but they did not receive the Spirit of miracles. Therefore Simon, seeing that it is given through the laying on of hands, came to the apostles, daring to trade with him. For before he saw others receiving the Spirit of miracles he was not bold to ask. How then did Philip baptize such a man? As Christ chose also Judas. And why did they not remove him as Ananias? Because once in the old time one who gathered the wood was put to death as a chastisement to others, and no other suffered this. [CHRYSOSTOM] — Commentary on Acts Pseudo-Clement : Then the people in indignation cast Simon from the court, and drove him forth from the gate of the house; and only one person followed him when he was driven out. Then silence being obtained, Peter began to address the people in this manner: You ought, brethren, to bear with wicked men patiently; knowing that although God could cut them off, yet He suffers them to remain even till the day appointed, in which judgment shall pass upon all. Why then should not we bear with those whom God suffers? Why should not we bear with fortitude the wrongs that they do to us, when He who is almighty does not take vengeance on them, that both His own goodness and the impiety of the wicked may be known? But if the wicked one had not found Simon to be his minister, he would doubtless have found another: for it is of necessity that in this life offenses come, 'but woe to that man by whom they come;' [Matthew 18:7] and therefore Simon is rather to be mourned over, because he has become a choice vessel for the wicked one, which undoubtedly would not have happened had he not received power over him for his former sins. For why should I further say that he once believed in our Jesus, and was persuaded that souls are immortal? [Acts 8:13] Although in this he is deluded by demons, yet he has persuaded himself that he has the soul of a murdered boy ministering to him in whatever he pleases to employ it in; in which truly, as I have said, he is deluded by demons, and therefore I spoke to him according to his own ideas: for he has learned from the Jews, that judgment and vengeance are to be brought forth against those who set themselves against the true faith, and do not repent. But here are men to whom, as being perfect in crimes, the wicked one appears, that he may deceive them, so that they may never be turned to repentance. — Recognitions (Book III)