“Seth material” search engine (Jane Roberts)

Beta was not meant to carry the full weight of conscious activity, however, although its accelerating qualities can lead to initiations into “higher” realms of consciousness, where indeed the brain waves quicken. The other patterns (delta, theta, and alpha) are highly important to physical and mental stability, being very interwound with cellular consciousness. In cases usually called schizophrenic, the beta acceleration is not supported by the stabilizing attributes of the other known frequencies.

[...] None of the communications from me have been in any way conducive to a development toward mental or emotional instability. [...]

[...] If anything, the personal advice I have given you both should add to your mental and emotional balance, and result in a stronger relationship with the outside world.

[...] On the other hand, I can operate only mentally in your world. [...]

[...] [These in turn lead to a last note.] In Chapter 3 of Seth Speaks, see the 519th session for March 23, 1970:) When I enter your system, I move through a series of mental and psychic events. [...]

[...] They are intimately connected, however, with mental states which are then materialized, and so your own mental processes are highly involved.