This paper, studies the way how St. Bonaventure deepens to the “Christian Socratism” (É. Gilson). St. Bonaventure through the philosophical, theological and Franciscans sources understands that the soul is united with the Good. The anthropology is not only philosophical, and the Good is not only a concept of the philosophy. San Buenaventura adds to the schemes of Plato and Aristotle, the Biblical scheme who understand that the soul is “image of God”. In Itinerarium mentis in Deum an alternative motto to the self knowledge sets out to us. It is invited to us to watch the soul that is loved itself, which supposes one of the sources of voluntarism.