The angels had no relation to one another. The Pelagians of old held, that Adam's transgression is hurtful to posterity by imitation only, not by imputation. But the text, 'In whom all have sinned,' confutes that. Not only is the guilt of Adam's sin imputed to us, but the depravity and corruption of his nature is transmitted to us, as poison is carried from the fountain to the cistern. It is said to be the old man, not that it is weak, as old men are, but for its long standing, and for its deformity.
Original sin has vim coactivam , the power of a law which binds the subject to allegiance.
Men must needs do what sin will have them, when they have both the love of sin to draw them, and the law of sin to force them. In original sin there is something privative, and something positive. We have lost that excellent quintessential frame of soul which once we had. Sin has cut the lock of original purity, where our strength lay. Original sin has contaminated and defiled our virgin nature.