In John 8, the phrase "I am he" is often translated with capital letters and without the word "he," even though the original Greek was entirely in capitals. This reflects a bias from the translators. By carefully reading John 8, it's clear that when Jesus says "I am he," he is referring back to his earlier statements. When the Pharisees asked him who he was, Jesus replied that he is who he has been saying all along: the Son of Man. This, in turn, refers back to his initial statement in the discourse that he is the light of the world. Jesus was sent by the Father to be this light because, as the Son of Man, he is also the judge.
