Including a detailed biographical annotation on the life and doings of St. Ambrose. *** Aurelius Ambrosius, better known in English as Saint Ambrose (c. between 337 and 340 - 4 April 397), was a bishop of Milan who became one of the most influential ecclesiastical figures of the 4th century. He was one of the four original doctors of the Church. This edition includes the following writings: Three Books on the Duties of the Clergy. Three Books on the Holy Spirit. The Two Books on the Decease of His Brother Saytrus. Exposition of the Christian Faith On the Mysteries. The Book Concerning the Mysteries. Two Books Concerning Repentance. Three Books Concerning Virgins. The Treatise Concerning Widows. Selections from the Letters of St. Ambrose. *** Echoes of the Eternal is a monumental series that brings together the defining texts of the world's spiritual, religious, and mythic heritage. From the sacred scriptures of Christianity, Islam, Buddhism, Hinduism, Judaism, and other global faiths, to the mystical writings of saints and sages, the myths of ancient civilizations, and the arcane literature of secret societies and occult traditions-this collection explores the full spectrum of humanity's search for the divine, the mysterious, and the transcendent. Each volume shapes spiritual consciousness and cultural identity across time. Whether it is the poetic wisdom of the Bhagavad Gita, the visionary revelations of the Qur'an, the esoteric allegories of the Kabbalah, the shamanic myths of indigenous peoples, or the secret doctrines of the Rosicrucians and Freemasons, this series reveals how humans have long sought to explain existence, destiny, and the unseen forces of the cosmos.