By Fr. Shenan J. Boquet, Human Life International - The central purpose of Humanae vitae is easily summarized and is well-known by many. In brief, it reiterates the long-standing Catholic and Christian belief in God’s plan for married love and the transmission of life—reasserting the moral impermissibility of contraception that attacks the procreative nature and unitive aspect of marriage... As Pope Paul VI stated, we cannot morally justify “any action which either before, at the moment of, or after sexual intercourse, is specifically intended to prevent procreation—whether as an end or as a means.”