He who loves his brother remains in the light, and there is no occasion for stumbling in him.

 He arrives at it because no one who accepts New Testament teaching can arrive at any other. It is the consistent teaching of the New Testament and it is the claim of Jesus himself that apart from him no man can know God. Jesus said quite clearly that no man knows the Father except the Son and him to whom the Son reveals that knowledge ( Matthew 11:27; Luke 10:22). Jesus said, "He who believes in me, believes not in me but in him who sent me. And he who sees me sees him who sent me" ( John 12:44-45). When, toward the end, Philip said that they would be content if Jesus would only show them the Father, Jesus' answer was: "He who has seen me has seen the Father" ( John 14:6-9). It is through Jesus that men know God; it is in Jesus that men can approach God. If we deny Jesus' right to speak, if we deny his special knowledge and his special relationship to God, we can have no more confidence in what he says. His words become no more than the guesses which any good and great man could make. Apart from Jesus we have no secure knowledge of God; to deny him is at the same time to lose all grip of God. 