each faculty of the soul.97 Thus, he heals his soul’s active part by ascetic practices; he heals his soul’s ability to know by true knowledge; and he purifies his soul’s ability to see by prayer. He then reaches perfection—true and permanent purity of heart and nous.98 When St. Gregory Palamas turns to consider the weapons used in the struggle for the soul’s purification of the passions, he refers to the beneficial influence of daily prayer and psalmody in the life of the believer: “For daily supplication