Fourth, that therefore the grace of Jesus Christ, prevenient delight, although efficacious by itself in relation to the will that it excites and moves, is not efficacious by itself in relation to the consent of the will, which can consent to it, and which resists it only too often either because as the soul withholds its consent too long spiritual delight does not continue, or because concupiscence constantly provides motives that are contrary to it.