Pieper defines the theme of sin and refers to the here and now of our time. Renouncing everything easy scholasticism, shows the perennial sin in the life of man and at the same time discover the deep roots that this concept, now purely Christian, is the ideology of a Homer, a Plato, Aristotle, reaching the great masters of the Middle Ages, especially St. Thomas Aquinas. Pieper is not content with a retrospective examination, but projects that this concept is anchored vital responsibility of man from the Christian point of view, the thinkers and poets who envision their strictly human transcendence and virtuality.
