Acts 8:13

Even Simon believed. I see no reason to conclude that Simon’s faith was spurious, though many students of this passage have concluded that he was an unbeliever. [Note: E.g., ibid., 4:544, 545; Toussaint, "Acts," p. 373; Wiersbe, 1:435-36; and Witherington, pp. 288-89.] The text says that he believed just as the others Luke mentioned (Acts 8:12), and there is no reason to doubt the reality of their faith. Having practiced Satan’s magic Simon could not believe the difference between Philip’s God-given miracles and his own magic.