Effort is only effort when it begins to hurt.

When you are fed up with the troublesome present, you take your gun, whistle for your dog, go out to the mountain, and, without further ado, give yourself the pleasure during a few hours or a few days of being "Paleolithic."

The real magic wand is the child's own mind.

Man is a fugitive from nature.

The good is, like nature, an immense landscape in which man advances through centuries of exploration.

We distinguish the excellent man from the common man by saying that the former is the one who makes great demands on himself, and the latter who makes no demands on himself.

There is no doubt; even a rejection can be the shadow of a caress”.