The solar plexus, the greatest and most important center of our dynamic consciousness, is a sympathetic center. At this main center of your first-mind we know as we can never mentally know. Primarily we know, each man, each living creature knows, profoundly and satisfactorily and without question, that _I am I._ This root of all knowledge and being is established in the solar plexus; it is dynamic, pre-mental knowledge, such as cannot be transferred into thought. Do not ask me to transfer the pre-mental dynamic knowledge into thought. It cannot be done. The knowledge that _I am I_ can never be thought: only known. This being the very first term of our life-knowledge, a knowledge established physically and psychically the moment the two parent nuclei fused, at the moment of the conception, it remains integral as a piece of knowledge in every subsequent nucleus derived from this one original. But yet the original nucleus, formed from the two parent nuclei at our conception, remains always primal and central, and is always the original fount and home of the first and supreme knowledge that _I am I._ This original nucleus is embodied in the solar plexus. But the original nucleus divides. The first division, as science knows, is a division of recoil. From the perfect oneing of the two parent nuclei in the egg-cell results a recoil or new assertion. That which was perfect _one_ now divides again, and in the recoil becomes again two. This second nucleus, the nucleus born of recoil, is the nuclear origin of all the great nuclei of the voluntary system, which are the nuclei of assertive individualism. And it remains central in the adult human body as it was in the egg-cell. In the adult human body the first nucleus of independence, first-born from the great original nucleus of our conception, lies always established in the lumbar ganglion. Here we have our positive center of independence, in a multifarious universe. At the solar plexus, the dynamic knowledge is this, that _I am I._ The solar plexus is the center of all the sympathetic system. The great prime knowledge is sympathetic in nature. I am I, in vital centrality. I am I, the vital center of all things. I am I, the clew to the whole. All is one with me. It is the one identity.