It is the one besetting sin of the human race.

It means the fall into automatism, mechanism, and nullity.
We know that life issues spontaneously at the great nodes of the psyche, the great nerve-centers.

At first these are four only: then, after puberty, they become eight: later there may still be an extension of the dynamic consciousness, a further polarization.

But eight is enough at the moment.
First at four, and then at eight dynamic centers of the human body, the human nervous system, life starts spontaneously into being.

The soul bursts day by day into fresh impulses, fresh desire, fresh purpose, at these our polar centers.