Lord’s Day 3, Chapter 4: The Universality of Depravity

Thus far we discussed the fall of our first parents in Paradise, and we reached the conclusion that it was, indeed, a fall, and not merely an act of sin. By the first act of disobedience, consisting in eating of the forbidden tree, the nature of our first parents was corrupted. It was not merely weakened, but actually debased and ethically corrupted, so that henceforth they could no longer serve the Lord their God in love. They lost the image of God, their knowledge of God became darkness;...