He came down to clothe the Apostles with power, and to baptize them.
For the Lord says, ye shall be baptized with the Holy Ghost not many days hence (Acts 1:5).
This grace was not in part, but His power was in full perfection.
For as he who plunges into the waters and is baptized is encompassed on all sides by the waters, so were they also baptized completely by the Holy Ghost.