DUNN, B. As it seems probable that no efforts will be spared on the part of many people in this country to make it a law of the land that a man may marry his deceased wife's sister , it is incumbent on all who fear God to know what His law is on the subject. The law of the land is not always the law of God. The one is made by man, the other by God, which is immutable. Therefore, if it be the law of God that "a man shall not marry his deceased wife's sister," it is not a question for debate at all.
Incest in the Bible
Incest in the Bible - Wikipedia
I thought it strange that Abraham claimed Sarah was his sister twice and then Isaac did the same thing. Apparently, they both feared for their lives, rather than laying down their lives for their wives. Abraham had experienced great military victories in the past, too, so it is hard to conceive he was fearful of anything or anyone. Was there a middle east custom whereby a husband would be killed to obtain his wife?
Compare Translations for Leviticus 18:18
Is incest a sin? Yes, it is also illegal and it should be reported. Incest is a form of child abuse and sexual immorality.
The repeated attempts made in every session of Parliament to pass a Bill which shall enable a widower to marry the sister of his deceased wife, and the very considerable sympathy which exists in the public mind in favour of those who are working for a relaxation of the existing laws, make it very important to state clearly and briefly the grounds on which the prohibition ought still to be maintained. The sympathy of the public, as far as it exists, rests upon a very narrow basis. People imagine that the best guardian for a widower's children would be found in the sister of his deceased wife, and they think it hard that the widower may not marry her. They forget that the widower can have this aid and solace immediately under the protection of the existing law; and that if such marriages were lawful, a widower could no more have a sister-in-law to dwell with him and keep his house than he could any other woman of equal social position; and that in fact the possibility of such a marriage would probably render both the widower and the sister-in-law unwilling to enter upon relations, which, confessedly might terminate in the sister taking the deceased wife's place.