162. 6. This union takes place gradually from the first days of marriage, and in people who are in a state of truly conjugial love, it becomes deeper and deeper to eternity. The first heat in marriage does not join two people together, because it draws its character from a love for the opposite sex, which is a love belonging to the body and on that account to the spirit. And whatever is in the spirit as a result of the body does not last long. But love that is in the body as a result of the spirit does last. Love belonging to the spirit, and to the body as a result of the spirit, is insinuated into the souls and minds of married partners together with friendship and mutual trust. When friendship and mutual trust join together with the first love in marriage, conjugial love results, which opens the partners' hearts and inspires in them the sweet enjoyments of love, and this more and more deeply as friendship and trust are added to the original love, and as that original love enters into this friendship and trust and they into it.