“Seth material” search engine (Jane Roberts)

This is much too difficult to go into deeply now. It might help you to reread the little material on mental enclosures. Expansion you see is a word that implies movement or enlargement in space, and space itself in the way the word is usually used, is a camouflage. Space, I have said, is the fifth dimension, but you have seen that this true space has little in common with the space that you usually think of. That is, fifth dimensional space is not an emptiness to be filled, being itself alive and vibrant, and changing its outer nature according to the plane which is composed of it.

Now I have said that a plane is not necessarily a location. It is not necessarily a planet, though it may be. The universe as you think of it contains innumerable planes, all taking up in your terms the same amount of space. The forms within these planes are in constant motion, as are the planes themselves. There is a continual exchange of energy and vitality, in other words, of actual atoms and molecules between one plane and another.