The Psalter is the collection of religious hymns of ancient Israel. Christ and His Apostles used it in their prayers, and the Church, due to its spiritual wealth, accepted it without any changes in its worship. Its importance for every believer is evident. However, the scientific approach to it is not always easy. It was deemed appropriate to proceed with the analysis of all the Psalms in a shorter form. We used the text that the Church employs in its worship, that is, the translation of the Septuagint (LXX). The Greek of this text is unique, and the difficulties presented regarding its correct understanding are many. A translation from the Hebrew original is relatively easy, as the help provided by the abundance of commentaries in all languages is significant. For the translation of the LXX, assistance is limited to a few recent efforts. All the work done so far to render the text into modern Greek is not translations but free interpretations. Each person rendered in their own words what they understood from the text they read. Our effort is to express the text in a form that is as close as possible to the original. Where this is not practically possible, the actual meaning of the text is noted as a comment. We do not claim that we render the text we are working on as authoritative. The help we receive from specialized dictionaries, as well as our engagement with the Old Testament, allows us to have an approach to the text that is as accurate as possible. The commentary consists of a brief presentation of the content of the Psalm and its temporal setting. The main differences from the Hebrew text (MT) are presented, and key theological concepts are interpreted. At the end of the book, there is a table of names and things. In addition to the Greek commentaries, which did not provide us with many solutions, we took into account representative commentaries from three European languages, namely German, French, and English. Of course, all these scholars base their work on the Masoretic text and not on the translation of the LXX. Nevertheless, the correct understanding of the Hebrew original often provides solutions, especially for obscure passages of the LXX translation.