Saint Teresa of Ávila was a mystic who experienced profound mystical visions and spiritual ecstasies, which she documented in her writings. She demonstrated exceptional courage in her efforts to reform the Carmelite Order, seeking to restore its original spirit of prayer and simplicity. Teresa's life and teachings emphasized the importance of prayer, contemplation, and the pursuit of divine union with God. Her writings, such as "The Interior Castle" and "The Way of Perfection," continue to inspire seekers of spiritual growth and union with the Divine.