A man always wants to know things he does not know; this dates from infancy. Children break things to see what is inside. But man does not know how to know; he expects too much. When he knows how to know, then heaven and earth are both revealed to him. If we want to see what is on the seventh floor, we must leave the ground floor. If we are on the first floor and cannot get to the higher floors, it means, as mysticism shows, that we certainly do wish to go up, but are captives on the first floor. That is the captivity.