The Holy Ghost; those extraordinary gifts before mentioned; for this appeared visibly and audibly, and by this indeed was signified the great change God's Spirit makes where he comes. He offered them money; this notorious hypocrite values these outward gifts; how much more valuable are the inward and spiritual gifts of God!
Related Commentaries of Acts 8:18
Acts 8:18
18 And when Simon saw that through laying on of the apostles' hands the Holy Ghost was given, he offered them money,