“If the course of all worlds as well as the course of their inhabitants, is from the grosser to the finer, then the inevitable conclusion is that the sun, our parent world, must be a planet in a state of development so far beyond, so much more spiritualized than our world, that its light is spiritual fire, and if our central luminary has been born from another world we may expect that the parent of our sun is as much beyond our sun in luminosity, refinement and spirituality, as our sun is more luminous than our earth.
Following the same analogy leads us to say that the parent of our sun must have a parent from which it was born, and that it is also transcendently more refined and spiritualized than its child. If worlds are born from their parents and become luminous suns, their density decreasing, or, in other words, if they become more refined, then, by an ever increasing ratio we may trace on, on, infinitely on, from child to parent in world-life, until worlds become so refined and attenuated that they are, so far as we are able to discern, immaterial.
It also follows from the mutual relation of a planet and its people that, as those luminous worlds unfold and develop, so their inhabitants unfold and develop, becoming together more refined and luminous; and as this refinement and spiritualization is the law of growth, there necessarily is a point where these immense worlds, with their inhabitants, become invisible – even spirit-substance to our comprehension.
And if worlds have existed from all eternity, then it necessarily follows that all space throughout the immensity of the universe is filled and inter-filled with worlds and systems of worlds, each governed by its own law, and each becoming higher, and still higher, more spiritual, and yet more spiritual, fine and ethereal, so that our solar system may be floating through a body of immense worlds, so refined, so spiritualized, that we have no consciousness of their presence, nor they of ours.
Thus, the manifestations of God, Spirit, are without limit, as to extent and planes of existence. Here our finite thought ends, but we see that there is no place where there is not an expression of God, a body formed by that Spirit that is omnipresent, who is the formless mind and will of all universes: formless, yet forming all things; expressionless, yet organizing forms to become the expression of his own great mind; and thus, we find ourselves thinking of God, Spirit, Formless-Substance, continually forming and expressing himself, through the forms that he has made.”
Hiram Butler
The Mark Of God: Understanding Your "I AM Presence" 