"Our argument so far is that contraceptive marital sex does not achieve any true per-sonalist end. It does not bring about self-fulfillment in marriage, but rather pre-vents and frustrates it. But - one may still ask - does it follow that open-to-life marital sex alone leads to the self-fulfillment of the spouses? I think it does; and the reason lies in the very nature of love. Love is creative. God's love (if we may put it this way) "drove" Him to create. Man's love, made in the image of God's, is also meant to create. If it deliberately does not do so, it frustrates itself."