Saint Hilary: A Letter to his Daughter Abraham (End of Year 558) The Complete Patrology; Volume X is a collection of letters from Saint Hilary, Bishop of Poitiers, to his daughter Abraham. In this work, the author shares his thoughts, wisdom and advice for life. The letter was written at the beginning of the 6th century and contains moral, spiritual and religious instructions. This book is an important source for the study of spiritual literature and theological views of the Middle Ages. It helps the reader to better understand the religious views and values of the era, as well as to appreciate the contribution of St. Hilary to the development of Christianity.