“Seth material” search engine (Jane Roberts)

These units then obviously change constantly. If we must speak in terms of size, then they change in size constantly as they expand and contract. Theoretically there is no limit, you see, to their rate of contraction or expansion. They are also absorbent. They do give off thermal qualities, and these are the only hint that your scientists have received of them so far.

Their characteristics draw them toward constant interchange. Clumps of them (Jane gestured; her delivery was quite emphatic and animated) will be drawn together, literally sealed, only to drop away and disperse once more. They form—and their nature is behind—what is commonly known as air, and they use this to move through. The air, in other words, can be said to be formed by animations of these units.

They constantly emanate out from the rock and return to it in a motion so swift it would seem simultaneous. The units meet with, and to some extent merge with, other units sent out, say, from foliage and all other objects. There is a constant blending, and also attraction and repulsion.