284. (13) They are adopted because of their shared involvement in the care of infants and concern for their children. It is well known that simulations of conjugial love spring up between married partners, or appearances of love and friendship that resemble truly conjugial ones, because of their infants and children. Their common love causes each partner to regard the other with kindness and favor. Love in the mother and love in the father for their infants and children are allied, like the heart and the lungs in the breast. A love of them in the mother is like the heart there, and a love for them in the father is like the lungs there. We make this comparison because the heart corresponds to love, and the lungs to understanding; and love arising from the will is what a mother feels, and love arising from the understanding is what a father feels. In the case of spiritual men a conjugial bond is formed by means of this love in accordance with justice and judgment: in accordance with justice, because the mother once carried them in her womb, in pain gave birth to them, and afterwards with unwearying care went on to nurse them, feed them, bathe them, clothe them and bring them up.