I indeed have baptized you with water
This was spoken to the baptized persons, partly to take off their dependence upon him and his baptism; and partly to direct their views to Christ, from whom the gifts and graces of the Spirit are alone to be had:
but he shall baptize you with the Holy Ghost;
(See Gill on Matthew 3:11). One copy adds, "and with fire", as there: a Jewish writer says, the holy blessed God baptizeth with fire, and the wise shall understand F16.
F16 R. Menachem in Lev. viii. apud Ainsworth on Gen. xvii. 12.