“Today, a particularly insidious obstacle to the task of educating is the massive presence in our society and culture of that relativism which, recognizing nothing as definitive, leaves as the ultimate criterion only the self with its desires. And under the semblance of freedom it becomes a prison for each one, for it separates people from one another, locking each person into his or her own self. With such a relativistic horizon, therefore, real education is not possible without the light of the truth; sooner or later, every person is in fact condemned to doubting the goodness of his or her own life and the relationships of which it consists, the validity of his or her commitment to build with others something in common.”