As Paul says, even though we as human beings know God, we refuse to acknowledge him. That's what Peter did. He refused even to "know" Jesus! Peter's failure reflects all our failure. It forces us to face the reality about ourselves. But the point of the story is that Jesus foretold this - he knew it was coming. And Jesus forgave Peter, when Peter confessed his love for Jesus. So the story illustrates both the horrible nature of sin, and the amazing reality of grace. That's essential to the whole meaning of the gospel.
Christopher J. H. WrightThere are four accounts of the gospel itself! The momentous events of the conception, birth, life, teaching, death, resurrection, and ascension of Jesus of Nazareth are too vast to be adequately viewed from one angle alone. Just as we need several points of view to "see" a person's face, so we need these varied emphases and angles to gain the full perspective of all God wants us to understand.
Christopher J. H. WrightMission means inviting all the peoples of the earth to hear the music of God's future and dance to it today.
Christopher J. H. WrightThe trouble today is that many Christians live in a kind of bubble of assumptions about what their Christianity means, especially if it places them comfortably among "the good guys," - assumptions that are likely to be drawn as much from folk-Christianity, surrounding political culture, popular pulp-books about the "End Times," or their favourite guru writer or therapist, than from sober and comprehensive reading of the Bible as a whole. Prophets and preachers have the unwelcome task of pricking that bubble with the sharpness of actual texts and teachings of the Bible itself.
Christopher J. H. Wright