Marriage #34
34. (19) Conjugial love depends upon the wife's love, and such too is the husband's love reciprocally; the wife's love does not depend on her husband's love. The reason is that just as the will acts on the understanding, good acts on truth; that is why it is said that a man ought to cleave to his wife. The reverse is true of those who are not in conjugial love.
Genesis 9:12
12
And God said, This is the token of the covenant which I make between me and you and every living creature that is with you, for perpetual generations:
