The works of St. Ignatius (Brianchaninov) included in the book, “The Sermon on the Sensual and Spiritual Vision of Spirits” and “The Sermon on Death,” reveal to the reader the mysterious spiritual world, the world of Angels and demons, the secrets of the afterlife of the soul after the physical death of a person, in vivid and with clear examples they teach how to correctly relate to phenomena from the other world, how to improve your spiritual life so as not to be deceived by the lures of evil spirits, but to save your soul for eternal life. The text is close to modern standards of spelling and punctuation and is equipped with a dictionary of obscure words .