St. Augustine: "Unity of heart"

“FOR there is nothing so social by nature, so anti-social by sin, as man. And if any man should ever need an argument against the evil of dissension, either to prevent it breaking out or to bring it to an end, there is nothing better than to recall that single father of all our human race who God created as a solitary individual, for the purpose of reminding us to preserve unity of heart in a multitude of men. And the fact that a woman was made from the side of the man shows clearly enough how highly we were meant to esteem the relationship between husband and wife.”

~St. Augustine: The City of God, 3, 12, 28.

Creation of Adam and Eve, by Lorenzo Ghiberti.
Gilded bronze, 1425-52; Baptistry, Florence.