What is the concept of the astral plane?

We learn rapidly the ways of the Astral plane—

We are able to see what goes on around us (once our mind-plate* is advanced enough to throw the photographed light of the picture before our eyes to show us what the thoughts of others have created). 

We also develop a technical plate, which is of value. 

As we live longer on the Astral plane, we develop slowly all the plates, which enable us to do everything by thought—create what we wish to possess about us, but it must be only for our happiness and for the good of those around us—helping all to see the light and to have greater comfort. 

As soon as a being begins to think of selfishly, wanting things he should not possess, to which he has no right, he loses his sense of what he has gained, and he goes back and—. 

A being here can possess anything, as long as his thought can create it, and it is clean and good and for the betterment of all, and is endowed with the truth. 

Astral beings are always learning more. 

There are planes and thoughts, countless in eternity, and all are striving for the oneness, which makes every plane the infinite—the everlasting eternity.

*There are twelve plates—and they are within the aura.