"The immensity of the far-flung creation of the Universal Father is utterly beyond the grasp of finite imagination; the enormousness of the master universe staggers the concept of even my order of being. But the mortal mind can be taught much about the plan and arrangement of the universes; you can know something of their physical organization and marvelous administration; you may learn much about the various groups of intelligent beings who inhabit the seven superuniverses of time and the central universe of eternity."
(Author: "A perfector of Wisdom acting by authority of the Ancients of Days.")
[12:0.1] 

"Spirit beings do not dwell in nebulous space; they do not inhabit ethereal worlds; they are domiciled on actual spheres of a material nature, worlds just as real as those on which mortals live."
[14:2.1]

"Your planet is a member of an enormous cosmos; you belong to a well-nigh infinite family of worlds, but your sphere is just as precisely administered and just as lovingly fostered as if it were the only inhabited world in all existence."
[15:14.9]