Saint Teresa of Jesus was born Teresa Sánchez de Cepeda Dávila y Ahumada at Ávila in Old Castile on 28 March 1515, the third child of Don Alonso Sánchez de Cepeda by his second wife, Doña Beatriz Dávila y Ahumada. Her childhood was happy amid siblings and cousins; she loved chivalric tales and serious books under the care of a pious father. Her mother died when Teresa was about fourteen; an elder brother fell in battle, and another left for the Spanish colonies. Sent to the Augustinian nuns of Our Lady of Grace at Ávila, she fell ill and returned home. An uncle introduced her to the Letters of Saint Jerome, which moved her to choose the religious life as the surest path to God.
Unable to win her father's consent, she left home secretly in November 1535 and entered the Carmelite Convent of the Incarnation at Ávila. The separation caused her a pain she later likened to death, yet her father soon yielded. She took the habit and made profession on 3 November 1537. Soon afterward grave illness reduced her to a desperate state; sisters prepared her funeral, yet she recovered in a few days in a manner judged inexplicable, though her health remained fragile for life. During convalescence she began mental prayer, then abandoned it for a time under scruples about worldly conversations, until Dominican and Jesuit directors restored her confidence.
God visited her with intellectual visions and locutions that strengthened her in trial. A sight of an image of the wounded Christ pierced her heart: she fell at His feet in tears and begged strength never to offend Him again. This second conversion opened the way to deeper mystical graces—ecstasies, the transverberation of her heart, spiritual espousals, and mystical marriage—described in the Life she wrote under obedience, the Relations, and the Interior Castle. Some confessors feared diabolical illusion; Saint Francis Borgia and Saint Peter of Alcántara discerned the work of God and guided her safely. A vision of the place prepared for her in hell should she prove unfaithful spurred her to a more perfect life.
Seeing the need to restore the primitive Carmelite rule, she founded the first convent of Discalced nuns of Saint Joseph at Ávila on 24 August 1562 amid strong opposition. The Carmelite general later approved further foundations of nuns and friars. In rapid succession she established houses at Medina del Campo, Malagón, Valladolid, Toledo, Pastrana, Salamanca, Alba de Tormes, Segovia, Beas, Seville, Caravaca, and elsewhere, recounting the story in her Book of Foundations. In 1567 she met the young priest who became Saint John of the Cross; together they planted the reform among the friars at Duruelo and other houses. Years of fierce persecution followed when authorities contested the reform; Teresa's letters record the storm that threatened to destroy the work. With the support of Philip II the Discalced province was canonically erected on 22 June 1580.
Despite broken health she continued founding at Villanueva de la Jara, Palencia, Soria, Granada, and Burgos. Leaving Burgos at the end of July 1582, she reached Alba de Tormes in September, took to her bed, and died on 4 October 1582—the next day reckoned as 15 October after the calendar reform—with the words "I die a daughter of the Church." Her body, later returned to Alba, is preserved incorrupt; her heart bears the marks of the transverberation. She was beatified by Paul V on 24 April 1614 and canonized by Gregory XV on 12 March 1622. On 27 September 1970 Paul VI proclaimed her Doctor of the Church, the first woman so honored in modern times, praising her doctrine of prayer and naming her Mater Spiritualium.
Her writings—Life, Way of Perfection, Interior Castle, Foundations, poems, and letters—spring from lived experience rather than abstract systems. They teach the soul's journey through the seven mansions to intimate union with God, the necessity of humility and detachment, and the marriage of contemplation with tireless charity.
May Saint Teresa of Jesus obtain for us a faithful spirit of prayer and the courage to reform our lives according to the Gospel.
