"In the natural act of completed marital sexual intercourse, there is a symbolic bodily unity of man and wife. However, in every form of unnatural birth control, there is a positive effort to destroy the [w:Procreative|procreative]] potential of an act that God has given us as a unique sign of married love. Looked at in another way, the sex act is meant by God to be a symbolic way in which a couple are called to renew, at least implicitly, their marriage covenant. In this bodily union, they are called to affirm anew their original promises of married love, to take each other for better or for worse, to be as one until death. Unnatural birth control contradicts the symbolic renewal of the marriage covenant. Instead, it says, "I take you for better but not for the imagined worse of parenthood.""