Seth -- spaceman, spacemen

The Nature of the Psyche: Its Human Expression
– Chapter 2: Your Dreaming Psyche is Awake
– Session 758, October 6, 1975 9:14 P.M. Monday

[... 25 paragraphs ...]

So, often such dreams are like programmed dramas, in that you clothe such visitations in familiar props. The same sort of thing frequently occurs when you experience extraordinary flashes of inspiration, or perceive other unofficial data. Quickly you try to make sense of such material in usual terms. An out-of-body experience into another level of reality becomes a visit to heaven, for example; or the heretofore-unrecognized voice of your own greater identity becomes the voice of God, or a spaceman or prophet. 

Dreams, "Evolution", and Value Fulfillment: Volume Two
– Chapter 9: Master Events and Reality Overlays
– Session 921, October 8, 1980 9:05 P.M. Wednesday

[... 9 paragraphs ...]

The supposedly telepathic messages can be attributed to contemporaries—enemies, gods, devils, or what have you. Spacemen are a recent addition. In most cases, what you have here are expressions of strong portions of the self that are more or less purposefully kept in isolation. They may appear or disappear, psychologically speaking. They present a kind of chain of command—one that is not usually permanent for any long period, however.

[... 1 paragraph ...]

In many situations, the main personifications are instead of a ritual nature, taking advantage of psychological patterns already present in the culture’s art or religion or science. You end up with Christs, spacemen, various saints or spirits, or other personality fabrications whose characteristics and abilities are already known.