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 their unique theologies have had on our Church and our world. She explains how our understanding of the cross, the incarnation of the Holy Spirit, and the human person have been enhanced by the work of these women. They may not have planned to be thought of as theologians, but reading about their lives, teaching, and writings will have a profound effect on how you live your faith.