William Burkitt on Acts 8:9

An account is here given of one of Philip's auditors at Samaria, Simon Magus by name, or Simon the sorcerer, a vile man, the blackest Ethiopian that ever baptismal water wet or washed. Notorious for sorcery, for hypocrisy, for final apostacy, and avowed impiety. Ecclesiastical history informs us of the heresies he broached, of the divine honours he assumed, of the statues and images built to him and his strumpet Helen, which lewdly accompanied with him; of an altar erected to him with this blasphemous inscription, Simoni Deo sancto, "To Simonthe holy God:" and of his tragical end, by breaking his neck, when attempting to fly up to heaven, because the people would no longer be cheated with his impostures here below.

From this example, note, 1. That into the most eminent and populous cities do oft-times enter the greatest and vilest impostors, the most atheistical and diabolical sorcerers: There they lurk and lodge, there they seek to set up and play their prizes.

Note, 2. That the vilest impostors, and the worst seducers have yet many, very many followers: The silly multitude is soon deluded: To him they all gave heed, from the least to the greatest.

Note, 3. That such vile deceivers have the confidence to brag, and the deluded multitude have the weakness to believe, that they are very extraordinary persons, and can do extraordinary things. Simon gave it out himself, that he was some great one; and the people cry him up as the great power of God.