Guidance Toward Spiritual Life: Answers to the Questions of Disciples - by Barsanuphius

A collection of over 850 letters from the 6th century, written in Greek by Christian hermits Barsanuphius and John the Prophet in Gaza. Offering spiritual and practical advice to monks, clergy, and laypeople, the work addresses theological, moral, and everyday concerns. Compiled circa 525–543 AD, it remains a cornerstone of Orthodox monastic wisdom, later translated into multiple languages, including English.