This book contains beautiful and mysterious words - words about the Creator of the worlds Himself. All Christians are baptized in His name - the name of the Father and the Son and the Holy Spirit, and in Him they have life and trust in Him. And is there anything more important than striving for knowledge of Him, for union with Him, for constant reflection on Him? God did not leave people in the dark: He entrusted the Church with the Revelation of Himself, revealed Himself in creation, and opened the way for Christians to endless knowledge of Himself. This book is designed to help the modern reader reveal the inner life of God of the Trinity. It is recommended for publication by the Publishing Council of the Russian Orthodox Church.