Deeply reflective and spiritually rich, The Interior Castle guides readers through the stages of inner transformation and devotion. Written by St. Teresa of Ávila, the book uses the metaphor of a castle with many rooms to describe the soul's journey toward spiritual fulfillment. Celebrated as a masterpiece of Christian mysticism, it offers insight, humility, and comfort to seekers of deeper faith and understanding. A profound work of spiritual literature that continues to inspire readers worldwide.