'Mightier' in the Bible

'I indeed do baptize you with water to reformation, but he who after me is coming is mightier than I, of whom I am not worthy to bear the sandals, he shall baptize you with the Holy Spirit and with fire,

and he proclaimed, saying, 'He doth come -- who is mightier than I -- after me, of whom I am not worthy -- having stooped down -- to loose the latchet of his sandals;

John answered, saying to all, 'I indeed with water do baptise you, but he cometh who is mightier than I, of whom I am not worthy to loose the latchet of his sandals -- he shall baptise you with the Holy Spirit and with fire;