226. (xvii) Truly conjugial love can exist with one of a married couple and not at the same time with the other.
One person can swear from the bottom of his heart to keep his marriage chaste, while the other does not know what chastity means. One can love what is to do with the church, while the other loves only worldly things. One can have his or her mind in heaven, while the other has his or hers in hell. So one can enjoy conjugial love, but not the other. Their minds, facing as they do in opposite directions, are inwardly in conflict; and if this does not show outwardly, still the one who lacks conjugial love looks upon his partner in the marriage contract as a tiresome old woman, and so forth.