Four women—Hildegard of Bingen, Catherine of Siena, Teresa of Avila, and Thérèse of Lisieux—have been honored with the title "Doctor of the Church." But what does that title mean, and what do these women mean for us today? Elizabeth Dreyer examines the history-changing effect each of these women's unique theologies have had on our Church and our world. Reading about their lives, teaching, and writings will have a profound effect on how you live your faith.