The just man is not the product of a day, but of a long brooding and a painful birth. To become a power for peace, a man must first pass through experiences which lead him to see things in their different aspects: it is necessary that he have a wide horizon, and breathe various atmospheres--in a word, from crossing, one after another, paths and points of view the most diverse, and sometimes the most contradictory, he must acquire the faculty of putting himself in the place of others and appreciating them.