One of the most famous philosophical writings in history, and major work by an Italian priest of the Catholic Church in the Dominican Order, and an immensely influential philosopher and theologian in the tradition of scholasticism, Saint Thomas Aquinas. In “Summa Theologica” the author tried to systematize the results of his work, to present them in brief and accessible form, first of all for students. The book consists of three parts - pars prima, pars prima secundae and pars secunda secundae, pars tertia. This volume comprises questions concerning the nature and attributes of God, the second includes articles devoted to the act of Creation and angels, and the third deals with a man and Providence. A disputable issue is set in the title of the article, then several arguments, giving contradictory answers, follow, along with the solution and answers to the arguments. Each chapter is connected to the previous and others with the general system of argumentation and provided with inner references. The treatise was not finished by Thomas Aquinas, due to his ecstatic vision, after which he stopped writing.