But him, who from this has trained himself to the summit of knowledge and the elevated height of the perfect man, all things relating to time and place help on, now that he has made it his choice to live infallibly, and subjects himself to training in order to the attainment of the stability of knowledge on each side. But in the case of those in whom there is still a heavy corner, leaning downwards, even that part which has been elevated by faith is dragged down. In him, then, who by gnostic training has acquired virtue which cannot be lost, habit becomes nature. And just as weight in a stone, so the knowledge of such an one is incapable of being lost. Not without, but through the exercise of will, and by the force of reason, and knowledge, and Providence, is it brought to become incapable of being lost. Through care it becomes incapable of being lost. He will employ caution so as to avoid sinning, and consideration to prevent the loss of virtue.