Was the sin of our first parents the eating of an apple, or the committing of adultery?

It was not a sin of adultery. Disorder in their passions was subsequent to their first sin. Their higher faculties had perfect control over their lower faculties until they had rebelled against God. Only after that did things lower than themselves, even their own passions, rebel against them. There is far less reason why lesser things should obey man than for man to obey God. Nor were they expelled for eating an apple. Nowhere is an apple mentioned. They disobediently partook of the tree of knowledge of good and evil. The fruit of that tree could not communicate knowledge to them, but where before they had not known the evil of sin, they now had the sad knowledge of what it meant to be at variance with God. Their violation of God’s prohibition was an implicit blasphemy, and a denial in practice of God’s right to dictate their conduct.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty