IV “I expect that, on the basis of psychoanalytical theories, you will explain to me how the development of a nervous ailment may be conceived!” I shall try. For this purpose, however, it is necessary that we study our “I” and “It” from a new point of view. We shall have to look upon these two factors as to their dynamic values, that is, in regard to the forces active in and between them. You will remember that previously we restricted ourselves to the description of the psychical apparatus. “I am only hoping that things won’t be so impossible to grasp.” I do not think so. As a matter of fact, I believe that you will soon comprehend the whole system. To start with, let us assume that those forces which actuate the soul apparatus are generated by the different organs of our system, as the result of important needs of our body. Don’t forget what the poet-philosopher Schiller once said: Until philosophy sublime, Supremely rules the course of time, The world, in oldest fashion, By hunger moves, and passion. Hunger and Passion are two very powerful agents! The needs of our body which stimulate the soul into action—actuate the soul, as I referred to it before—we call urges. It is these urges which fill the “It.” All energies generated by the “It” were incepted by these urges. The powers of the “I” have no other origin either, inasmuch as they are derived from the “It.” What, now, do these urges want? They want to be satisfied, that is, they endeavor to create such situations whereby the needs of our body are gratified. As soon as any tension, created by our urges, slackens simultaneously with the satisfied cravings of our body, our Consciousness experiences a pleasurable sensation, whereas an intensification of our urges will soon enough result in decided displeasure. In accordance with these fluctuations of pleasurable and distressing sensations, our soul apparatus regulates its activity. Thus, the rule of the Pleasure Principle manifests itself. Intolerable conditions develop in case the urges of the “It” are not satisfied. Experience proves that situations of complete gratification can only be achieved in contact with the outer world. Thus, that part of the “It” which faces the outer world, i. e., the “I,” assumes its functions. While the driving power is produced by the “It,” it is the “I” which then assumes the management, takes the steering wheel in hand, so to speak, without which the coveted goal could never be reached.