Abstract
In this paper, I should like to reflect on what has to take place for a piece of stone to become a "club," for a hole in a rock face to become a "cave," for a configuration of the earth's surface to become a profile on a "horizon."
In this paper, I should like to reflect on what has to take place for a piece of stone to become a "club," for a hole in a rock face to become a "cave," for a configuration of the earth's surface to become a profile on a "horizon."