Long treasured by saints such as Teresa of Avila, this classic guide to mental prayer offers clear and practical direction for deepening one’s life of meditation. Written by St. Peter of Alcantara, it leads readers through the disciplines of self denial and recollection that purify the soul and prepare it for deeper union with God. Addressing distractions, dryness, devotion, and common errors in prayer, it provides time tested counsel for growing from the early stages of spiritual struggle into a more luminous and grace filled friendship with the Lord.