Quotes from the Saints
The Two Hundred Chapters on Knowledge:
198. The one who keeps untarnished the way of virtue with religious and upright knowledge and does not fall away will discover the presence of God in him through detachment. "I will sing and be wise in a blameless path when you come to me." The psalm means a virtuous way of asceticism; being wise in the gnostic understanding which comes from virtue whereby one who waits for the Lord in the watchfulness of the virtues experiences the divine presence.
199. It is not necessary that the beginner in devotion be led to the practice of the commandments by goodness alone, but also that he struggle more often in severe trials by keeping in mind the divine judgments. In this way he not only loves by longing for the divine but also resists our of fear and wickedness. "I will sing to you, Lord of mercy and judgment" - so that gladdened by longing he might address God, and being furnished a mouth by fear he might make bold to sing.
200. The one who has joined the body to the soul through virtue and knowledge has become a lyre and a flute and a temple. A lyre, firstly, because he beautifully maintains the harmony of the virtues; next, a flute because through the divine experiences he receives the Spirit's inspiration; finally, a temple because through purity of his mind he has become the Word's dwelling place.
St. Maximus the Confessor