This opinion is contrary to Christian doctrine, which states that every genital act must be within the framework of marriage. However firm the intention of those who practice such premature sexual relations may be, the fact remains that these relations cannot ensure, in sincerity and fidelity, the interpersonal relationship between a man and a woman, nor especially can they protect this relationship from whims and caprices. Now it is a stable union that Jesus willed, and He restored its original requirement, beginning with the sexual difference. "Have you not read that the Creator from the beginning made them male and female and that He said: This is why a man must leave father and mother, and cling to his wife, and the two become one body? They are no longer two, therefore, but one body. So then, what God has united, man must not divide."[¹³] St. Paul will be even more explicit when he shows that if unmarried people or widows cannot live chastely they have no other alternative than the stable union of marriage: ". . .it is better to marry than to be aflame with passion."[¹⁴] Through marriage, in fact, the love of married people is taken up into that love which Christ irrevocably has for the Church,[¹⁵] while dissolute sexual union[¹⁶] defiles the temple of the Holy Spirit which the Christian has become. Sexual union therefore is only legitimate if a definitive community of life has been established between the man and the woman.