Before puberty the child's personality has not yet formed and it is easier to guide its life and make it acquire specific habits of order, discipline, and work . . ."

The challenge of modernity is to live without illusions and without becoming disillusioned.

"[E]very action of ours is passed on to others according to its value, of good or evil, it passes from father to son, from one generation to the next, in a perpetual movement."

"[A]fter puberty the personality develops impetuously and all extraneous intervention becomes odious. . . . Now it so happens that parents feel the responsibility towards their children precisely during this second period, when it is too late."

"I'm a pessimist because of intelligence, but an optimist because of will."