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.