ANSWER: This bent is derived from fallen Adam. His sin damaged the whole race. The perfected holiness of the parents is not a natural but an acquired quality, which cannot be transmitted any more than any manual dexterity of mental attainment can be transmitted by descent. There are mysteries in heredity. How can black-haired parents have a redhead among their children? How did it come down from some ancestors who lived centuries before? When these questions are answered we will try to answer how a depraved child can be born of holy parents. It is true that the parent may intensify or diminish the evil trend in their child, but they cannot wholly remove it. That is the work of God only.
— From Steele's Answers pp. 13, 14.