Christ teaches that his highest will for our lives is to love as he loves (see John 15:12). One of John Paul’s main insights is that God inscribed this vocation to love as he loves right in our bodies by creating us male and female and calling us to become “one flesh” (see Gen. 2:24). Far from being a footnote in the Christian life, the way we understand the body and the sexual relationship “concerns the whole Bible.”4 It plunges us into “the perspective of the whole gospel, of the whole teaching,