"How far we fell in the first Adam, I do not know and cannot tell. I know neither the height of his original righteousness and fellowship with God nor the depth of his exceeding sinfulness, wretchedness, and separation from God. It seems that we learn of righteousness and sinfulness simultaneously. You can not see more of the one without seeing more of the other; and presently, while in this flesh, we know very little of either. I imagine that when we come to "know as we are known", we shall be greatly surprised.
But however that may be, this I am sure of: however great our loss in the first Adam, our gain in the last Adam is much, much greater. For "where SIN did abound, GRACE did much more abound" (Rom. 5:20). Grace, which comes by the last Adam, does not merely make up our terrible loss. He pays our debt AND MAKES US RICH! He gives the old guilty, believing sinner a Divine nature, divine righteousness, and eternal glory as sons and daughters. He not only took away sin and the curse from us, but "MUCH MORE!"