The writings of St. Theresa have gained a steadily widening audience from the 16th cent. to the present; in 1970 Pope Paul VI named St. Theresa a Doctor of the Church, the first woman so honored. The Castilian in which St. Theresa wrote stems from common speech, and the imagery is rich but simple. Candor and overflowing spiritual strength lend a greater beauty to the sometimes terse, sometimes discursive expressions. Her works were dominated by love of God and characterized by humor, intelligence, and common sense.
The Life (written 1562–65) is a spiritual autobiography written for her confessors and containing not only the record of her progress in mysticism but also short treatises on prayer and vision; editions usually include the supplementary Relations, short pieces written for the same purpose as the Life. Her Way of Perfection was written after 1565 to supply her nuns worthy instruction on prayer; it is still found very useful by the religious and by layreaders. In Interior Castle (written in 1577) she gives a glowing and powerful picture of the contemplative life. The Foundations (written 1573–82) is an account of the launching of her order.
Her letters—brisk, vigorous, full of wisdom and humor—are much loved. She also wrote shorter pieces— Exclamations of the Soul to God (1569), rhapsodic meditations; a commentary on the mystic significance of the Song of Solomon; the Constitutions, for the Discalced Carmelite nuns; and Method for the Visitation of Convents of Discalced Nuns. There have been several translations of her writings, including E. Allison Peers (3 vol., 1957).
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