This classic poem and commentary describes the two necessary stages of purification—of the senses and of the spirit—that the soul must undergo to achieve union with God. John of the Cross explains these periods of intense spiritual dryness and suffering as a passive cleansing process guided by divine love.

This comprehensive guide uses the metaphor of a magnificent castle with seven mansions to map the soul's journey from initial prayer to the highest stages of mystical union with God. Teresa provides practical instruction and deep spiritual insight into the virtues and trials encountered as we progress toward the innermost chamber of divine love.