As delusions obscure and pervert the operations of the mind, so the passions hamper the will, and at times hold it captive. As a result of original sin man's will is not only weakened, but his nature inclines inordinately to one of the eleven passions. This inclination is called his predominant passion. It is inborn in him and permeates his entire temperament. The predominant passion has so great an influence on his daily life, when not directed by a good will, that the saints called it man's greatest enemy.