This is one of the world’s most celebrated books on mystical theology. It is the most sublime and mature of St. Teresa of Avila’s works and expresses the full flowering of her deep experience in guiding souls toward spiritual perfection. In addition to its profound mystical content, it is also a treasury of unforgettable maxims on such ascetic subjects as self-knowledge, humility, detachment, and suffering. But above all, this account of a soul’s progress in virtue and grace is the record of Teresa’s interior life. Her courageous soul, luminous mind, and endearingly human temperament hold a deep attraction for the modern mind.