Why Satan Seeks to Weaken Self-control—Satan seeks to lower the standard of purity and to weaken the self-control of those who enter the marriage relation, because he knows that while the baser passions are in the ascendancy, the moral powers grow steadily weaker, and he need have no concern as to their spiritual growth. He knows, too, that in no way can he better stamp his own hateful image upon their offspring, and that he can thus mold their character even more readily than he can the character of the parents. [12] – {AH 124.1} Adventist Home By Ellen G. WhiteH

The Privileges of the Marriage Relation—Those professing to be Christians … should duly consider the result of every privilege [Note: On another occasion Mrs. White speaks of the “Privacy And Privileges Of The Family Relation.” See Testimonies for the Church 2:90.—Compilers.] of the marriage relation, and sanctified principle should be the basis of every action. [5] – {AH 122.1}
In very many cases the parents … have abused their marriage privileges, and by indulgence have strengthened their animal passions. [6] – {AH 122.2} Adventist Home E.G.White