In 1562, Teresa of Ávila began her mystical experiences and writings, which would lead to the reform of the Carmelite order. Her works, particularly 'The Interior Castle', explored themes of spirituality, prayer, and the soul's journey towards God. Teresa's contributions to mysticism and spirituality had a profound impact on Catholic thought and the role of women in the church.

Teresa of Ávila's mystical experiences and writings in 1562 provided powerful metaphors for spiritual union, influencing Spanish Golden Age poetry. Poets like San Juan de la Cruz drew upon her insights, exploring the depths of divine love and the human soul's journey.