John's Baptism that was a Water Baptism was only for a time until CHRIST comes and Baptizes the believer with the Holy Ghost unto Salvation and the Fire Represents God's Presence and Power. Water Baptism was required as a symbol of what was to come, but now that the Savior has come, we are Saved by the Holy Spirit Baptism, NOT water Baptism.
Mt 3:11 I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire:
Lu 3:16 John answered, saying unto them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire:
It is the Holy Spirit that Baptizes unto Salvation:
1Co 12:13 For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit. {Gentiles: Gr. Greeks}