This phenomenon, though not stressed by Jan Cox, I don't think, is called in a history of mysticism, Latin equivalent of " a horror of vacuum." I am calling it the scary side of This Kind of Stuff. It must exist, or something else in the category of scary things --, else why isn't everybody awake. Why isn't anyone awake? This is an ordinary level of mentation type of question, wherein we pretend that binary thought has a usefulness beyond the external world. Why would the concrete evidence of peace and joy, available to every sincere person who can follow the clear and unambiguous instructions for neuralizing (one of many of Jan's descriptions of self-observation), not motivate a cascade of practice and reaping of reward?
Is, within the realm where words can get loosened, there a sense of the edge of nothing, which is commonly perceived by the ordinary mind, as 'scary.' Talking about phenomenal reality here. It is an interesting question because the effects are rather the opposite according to proponents of the practice of self-observation. Might have to put on your deerstalker, for this one ---- or take it off: