The current publication is the English translation of the 2nd edition of the book in Greek “Ὁµιλίες Μεγάλων Μυστῶν” (Speeches of Great Mystics). It is a selection of spiritualistic Texts transmitted by Higher Spiritual Entities. Modern man is no more satisfied with what established doctrines and various philosophical systems have to offer. He seeks to quench his thirst for spiritual knowledge in areas, such as esoterism, mysticism, theosophy, eastern religions and systems, etc. without finding the expected spiritual satisfaction and enlightenment. In this modern labyrinth of confusing doctrines and beliefs, Teachers from the Highest Hierarchy of the Spiritual World come to enlighten man on his path, by clarifying obscure points of past teachings and revealing truths and knowledge for the future evolution of humanity. Some of these Teachers have been well-known Great Mystics on Earth. Others have lived as unknown men but they were very evolved entities and they are revealed through these Texts.