'Mightier' in the Bible

I indeed baptize you in water for repentance, but he who comes after me is mightier than I, whose shoes I am not worthy to carry. He will baptize you in the Holy Spirit.

He preached, saying, "After me comes he who is mightier than I, the thong of whose sandals I am not worthy to stoop down and loosen.

John answered them all, "I indeed baptize you with water, but he comes who is mightier than I, the latchet of whose sandals I am not worthy to loosen. He will baptize you in the Holy Spirit and fire,