True marriage love is impossible except between two, like the Lord's love toward heaven, which is one from Him and in Him, or toward the church, which like heaven is one from Him and in Him. All who are in the heavens and who are in the church must be one through mutual love from love to the Lord. An angel in heaven or a man in the church who does not thus make one with the rest is not of heaven or of the church. Moreover, in the whole heaven and in the whole world there are two things to which all things have reference; these two are called good and truth, from which, when joined into one, all things in heaven and in the world have had existence and subsistence. When these are one, good is in truth and truth is in good, and truth is of good and good is of truth; thus one recognizes the other as its mutual and reciprocal, or as an agent recognizes its reagent, each in its turn. This universal marriage is the source of marriage love between husband and wife. The husband has been so created as to be the understanding of truth, and the wife so created as to be the will of good, and thus the husband to be a truth and the wife a good, as well as that both may be truth and good in form, which form is man, and an image of God. Since, then, for truth to come to be of good and good to be of truth mutually and reciprocally has its origin in creation, so it is impossible for one truth to be united to two diverse goods, or the reverse; neither is it possible for one understanding to be united to two diverse wills or the reverse; neither for one person who is spiritual to be united to two diverse churches; neither in like manner for one man (vir) to be inmostly united to two women. Inmost union is like that of soul and heart; the soul of the wife is the husband, and the heart of the husband is the wife. The husband communicates and conjoins his soul to the wife by actual love; it is in his seed; and the wife receives it in her heart, and from this the two become one, and then each and all things in the body of the one look to their mutual in the body of the other. This is genuine marriage, which is possible only between two. For it is by creation that all things of the husband, both of his mind and of his body, have their mutual in the mind and in the body of the wife; and thus the most particular things look mutually to each other and will to be united. From this looking and conatus [instinct] marriage love springs.