Recently someone lobbed the following at me: "I know that Seth says, 'You create your own reality,' BUT..." My response: "What Seth actually means is that we create the physical reality that we perceive, which is proven in quantum physics." And then I thought more on this, as I always do... And I realized that this particular Sethism, which has been used to characterize (and discredit) all of New Age philosophy, actually does, at times, seem to mean what it seems to mean: That we, from whole cloth, ex nihilo, create our world, and we are responsible for (or to blame for) all that results.
The careful philosopher will immediately recognize that if, indeed, the reality that we perceive is what we have in fact "created," we have no mechanism for proving otherwise. It is a completely self-contained and self-referential logical conundrum that has tripped many a wannabe guru and resulted in the wastage of much valuable camouflage time. So why did Seth keep saying it?
It's possible that "he" wanted the readers of the Seth material to begin to look beyond our narrow definition of "self" enough to wonder, "If I'm not consciously aware of creating my reality, is there a part of 'me' that I'm not consciously aware of that IS doing the creating? Who or what is this other part of me, and how can become acquainted with it?" Perhaps this question mirrors what may have been the primordial First Question that reportedly birthed reality when All-That-Is asked, "Who am I, and who am I not?"