Matthew 3:8-11

Bring forth fruit that is consistent with repentance [let your lives prove your change of heart]; And do not presume to say to yourselves, We have Abraham for our forefather; for I tell you, God is able to raise up descendants for Abraham from these stones! And already the ax is lying at the root of the trees; every tree therefore that does not bear good fruit is cut down and thrown into the fire. I indeed baptize you in (with) water because of repentance [that is, because of your changing your minds for the better, heartily amending your ways, with abhorrence of your past sins]. But He Who is coming after me is mightier than I, Whose sandals I am not worthy or fit to take off or carry; He will baptize you with the Holy Spirit and with fire.