Clearly some external sign accompanied the coming of the Spirit to baptize because the people present perceived it as happening. Simon desired to buy the ability to produce Spirit baptism and its accompanying sign from Peter and John (cf. Acts 19:19). This practice, the attempt to buy spiritual powers and offices, has become identified with Simon"s name (i.e, simony). Simon failed to appreciate the uniqueness of Spirit baptism. He appears to have wanted to produce this in anyone, not just believers. Perhaps Simon"s error was an innocent mistake due to theological ignorance. It was clear to Simon that the laying on of hands communicated Spirit baptism ( Acts 8:19). [source][source][source]