The book "Commentary on the Gospel" offers an in-depth analysis of the theological debates of the 5th century that have accompanied the Church Father for years. It highlights the distinction of the two natures in Christ and the defense of the doctrine of the pre-existent Logos as well as the divinity of Christ. By using the Gospel of John as a textual basis, the message of Christ is translated into contemporary reality. The author, Susanne Greiner, conveys the relevance of these theological topics and their significance for faith even today. This work is of interest not only to theologians but also to anyone who wishes to engage with the development of Christianity and its teachings.