Jansenism:
http://www.newadvent.org/cathen/08285a.htmAs a result of Adam's sin, our nature stripped of elements essential to its integrity, is radically corrupt and depraved.
Mastered by concupiscence, which in each of us properly constitutes original sin, the will is powerless to resist; it has become purely passive. It cannot escape the attraction of evil except it be aided by a movement of grace superior to and triumphant over the force of concupiscence. Our soul, henceforth obedient to no motive save that of pleasure, is at the mercy of the delectation, earthly or heavenly, which for the time being attracts it with the greatest strength. At once inevitable and irresistible, this delectation, if it come from heaven or from grace, leads man to virtue; if it come from nature or concupiscence, it determines him to sin. In the one case as in the other, the will is fatally swept on by the preponderant impulse. The two delectations says Jansenius, are like the two arms of a balance, of which the one cannot rise unless the other be lowered and vice versa. Thus man irresistibly, although voluntarily, does either good or evil, according as he is dominated by grace or by concupiscence; he never resists either the one or the other. In this system there is evidently no place for purely sufficient grace.... :reading: