"On the Prayer of Jesus: The Classic Guide to the Practice of Unceasing Prayer" by Ignatius Brianchaninov is a detailed exploration of the Jesus Prayer, a central practice in Eastern Orthodox spirituality. Drawing on themes from "The Way of a Pilgrim," this guide offers practical advice and theological insights into the continual recitation of the Jesus Prayer as a means to deepen one’s spiritual life and maintain a constant awareness of God’s presence. Brianchaninov’s work emphasizes the transformative power of this practice for achieving inner peace and communion with God.