Hendrik Willem Van Loon

Any formal attack on ignorance is bound to fail because the masses are always ready to defend their most precious possession - their ignorance.

High in the North in a land called Svithjod there is a mountain. It is a hundred miles long and a hundred miles high and once every thousand years a little bird comes to this mountain to sharpen its beak. When the mountain has thus been worn away a single day of eternity will have passed.

On the other hand, when you grow up you will discover that some of the people in this world never passed beyond the stage of the cave-man.