Intellectual and spiritual formation of Joseph Ratzinger - Pope Benedict XVI - requires talk about the process of his development. The article refers to the most overlooked phase of the young Ratzinger, who moves from the position of a progres-sive and sometimes irresponsible theorizing academic theologian to the position of a thinker grounded in the community of faith, becoming the guardian and teacher of Christian doctrine in line with the spirit and tradition of the Church. A lot of light on the change in the attitude of the German professor sheds the preparatory phase to the Second Vatican Council and its debates, as well as the unpleasant experience of the student revolt in 1968, which finds our professor in Tübingen. And in this way the liberal German theologian grows into to an outstanding Catholic theologian of the universal Church.