Piper on the centrality of Christ

Something of immense historical significance happened with the coming of the Son of God into the world. So great was the significance of this event that the focus of saving faith was henceforth made to center on Jesus Christ alone. So fully does Christ sum up all the revelation of God and all the hopes of God's people that it would henceforth be a dishonor to him should saving faith repose on anyone but him.