While we teach knowledge, we are losing that teaching which is the most important one for human development: the teaching which can only be given by the simple presence of a mature, loving person.

Man can never stand still. He must find solutions to this contradiction, and ever better solutions to the extent to which reality enables him.

There is a creative pleasure, which, for instance, the artisan in the Middle Ages, or in a country like Mexico, still today has - namely the pleasure of creating something. You find quite a few skilled workers who still have that pleasure: maybe in a steel mill; maybe a worker who works with a complicated machine - he has a sense that he is creating something.

The fact that millions of people share the same vices does not make these vices virtues, the fact that they share so many errors does not make the errors to be truths, and the fact that millions of people share the same form of mental pathology does not make these people sane.

We may know ourselves, and yet even with all the efforts we make, we do not know ourselves. We know our fellowman, and yet we do not know him, because we are not a thing, and our fellowman is not a thing. The further we reach into the depths of our being, on someone else's being, the more the goal of knowledge eludes us.

There is perhaps no phenomenon which contains so much destructive feeling as moral indignation, which permits envy or to be acted out under the guise of virtue.

Man does not only sell commodities, he sells himself and feels himself to be a commodity.