Pistorius interpreted it as follows: “The swing, which sent you up into the air, is the great property of mankind, which everyone possesses. It is the feeling of close relationship with the springs of every force, but it soon causes anxiety. It is cursedly dangerous! For that reason most people willingly renounce flying, preferring to walk according to prescribed laws along the footpath. But not you. You fly higher, as befits an intelligent fellow. And behold, you make a wonderful discovery there, namely, you gradually get the mastery over the impelling force. In other words, you acquire a fine little force of your own, an instrument, a rudder. That is splendid. Without that one goes floating into the air without any will of one’s own; madmen, for instance, do that. They have deeper presentiments than the people on the footpath. But they have no key and no rudder, they fall whistling through the air, down into the fathomless depths. But you, Sinclair, you manage all right! And how, pray? You probably don’t even know. You manage with a new instrument, with a breath regulator. And now you can see, that your soul isn’t really ‘personal’ at bottom. I mean that you didn’t invent this regulator. It isn’t new. It is a loan, it has existed for thousands of years.