As a result of the Ephesians being witness to the failure of the Sons of Sceva attempting to exorcise a demon from a man, they came to Christ because of His name. They witnessed Paul doing "Unusual Miracles" and it caused them to have their eyes opened. They had been duped by these wanna be ghost busters in the past. What a miraculous thing it must have been to see them come to Christ! They also brought all their ghost buster paraphernalia and burned it.