"the sin of Simon Magus"

The sin of Simon Magus is presented in the Bible, Acts 8:18-24. Simon wanted the power of the Holy Spirit, which he believed the Apostles could bestow. He wrongly offered to pay for this power. Later Christians believed he was a demon in human form, sent to tempt the Apostles; he was said to be able to fly. The stories of Simon the Sorcerer persisted into Medieval times.