Summary

Berard Vogt Duns Scotus, Defender of the Immaculate Conception (1955)

As a child of Adam she would, in the ordinary course of events and according to the ordinary course of nature, have incurred Adam’s debt like the rest of mankind. But in the order of time God could give her sanctifying grace at the very moment of her conception. In this way Mary, though a child of Adam in the order of nature, would be made a child of God by the infusion of grace before original sin could take effect in her soul.
"Every natural child of Adam,” writes Scotus, "is a debtor of original justice, and is deprived of it through the sin of Adam.
Source: Wikisource

Berard Vogt Duns Scotus, Defender of the Immaculate Conception (1955)

Adam’s sin severed the supernatural bond between God and man by depriving man of sanctifying grace. It likewise deprived him of the concomitant gift of integrity or primordial rectitude which had kept the lower appetites of the body under control of the will. Man is now inordinately drawn to the gratification of his lower nature and away from God. This deordination found in our nature as a consequence of original sin we call concupiscence. It is the tendency of the sentient appetite and the passions to go out to sensible good before and in spite of the judgment of reason.
Source: Wikisource

Berard Vogt Duns Scotus, Defender of the Immaculate Conception (1955)

In other words, because of Adam’s sin we are now deprived of the moderating check of original integrity. In consequence, we now have a state of rebellion and moral struggle, whereas in paradise there existed a holy state of harmony.
To sum up: for Scotus, original sin is a moral defect found in the soul of man. Its cause is a moral demeriting cause. In a word, original sin consists in the absence of due original justice that should be there, because received by our first parent and culpably lost by him.
Source: Wikisource

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