Reading and analysis of a text which dates back to 1947 and which Von Balthasar, considering it still valid, re-edited in 1985 as the first volume of Teologica. The volume, as the Author declares on several occasions in the original introduction of 1985, is an investigation of a philosophical nature. The truth of the world is presented in four aspects: truth as nature, truth as freedom, truth as mystery, truth as participation.