Whether a believer can marry an unbeliever?

❌ Objection 1 : It would seem that a believer can marry an unbeliever. For Joseph married an Egyptian woman, and Esther married Assuerus: and in both marriages there was disparity of worship, since one was an unbeliever and the other a believer. Therefore disparity of worship previous to marriage is not an impediment thereto.

❌ Objection 2 : Further, the Old Law teaches the same faith as the New. But according to the Old Law there could be marriage between a believer and an unbeliever, as evidenced by Dt. 21:10 seqq.: "If thou go out to the fight . . . and seest in the number of the captives a beautiful woman and lovest her, and wilt have her to wife . . . thou shalt go in unto her, and shalt sleep with her, and she shall be thy wife." Therefore it is lawful also under the New Law.

❌ Objection 3 : Further, betrothal is directed to marriage. Now there can be a betrothal between a believer and an unbeliever in the case where a condition is made of the latter's future conversion. Therefore under the same condition there can be marriage between them.

❌ Objection 4 : Further, every impediment to marriage is in some way contrary to marriage. But unbelief is not contrary to marriage, since marriage fulfills an office of nature whose dictate faith surpasses. Therefore disparity of worship is not an impediment to marriage.

❌ Objection 5 : Further, there is sometime disparity of worship even between two persons who are baptized, for instance when, after Baptism, a person falls into heresy. Yet if such a person marry a believer, it is nevertheless a valid marriage. Therefore disparity of worship is not an impediment to marriage.