It is the will of the Lord that His disciples should possess great powers; it is His will that the same things which He did when on earth should be done in His Name by His servants. For He said: “You shall do greater things than these.” He gave them power to raise the dead. And whereas He could Himself have restored to Saul the use of his sight, He nevertheless sent him to His disciple Ananias, that by his blessing Saul’s eyes might be restored, the sight of which he had lost. Peter also He bade walk with Himself on the sea, and because he faltered He blamed him for lessening the grace given him by the weakness of his faith. He Who Himself was the light of the world granted to His disciples to be the light of the world through grace. And because He purposed to descend from heaven and to ascend thither again, He took up Elijah into heaven to restore him again to earth at the time which should please Him. And being baptized with the Holy Spirit and with fire, He foreshadowed the Sacrament of Baptism at the hands of John.

And in fine He gave all gifts to His disciples, of whom He said: “In My Name they shall cast out devils; they shall speak with new tongues; they shall take up serpents; and if they shall drink any deadly thing it shall not hurt them; they shall lay hands on the sick, and they shall do well.” So, then, He gave them all things, but there is no power of man exercised in these things, in which the grace of the divine gift operates. — Book I, Chapter 8