There is still another reason why Catholics should dread mixed marriages. If the one who is not a Catholic loses regard for his or her obligations, becomes addicted to any vice, and is leading a bad life, the Catholic party has no means of reaching the root of the evil, no hope that the person may take the advice of the priest, or go to confession or do any of those things that could effect a change in the heart and life of a Catholic. For all these very good reasons and others besides, the Church opposes mixed marriages, as they are called when one of the persons is not a Catholic. Neither does the Church want persons to become converts simply for the sake of marrying a Catholic. Such conversions would not be sincere, and would do no good, but rather make such converts hypocrites, and guilty of greater sin.
Many marriages prove unhappy because they are entered into hastily and without worthy motives. .
In a word, those wishing to marry should look for enduring qualities in their lifelong companions, and not for characteristics that please the fancy for the time being. They should, besides, truly love each other. Again, the persons should be nearly equals in education, social standing, etc., for it helps greatly to secure harmony between families and unity of thought and action between themselves. The motives are worthy when persons marry to fulfill the end for which God instituted marriage. It would, for example, be an unworthy motive to marry solely for money, property, or other advantage, without any regard for the holiness and end of the Sacrament.