In the vacuum lies great horror, akin to the presence or absence of life and death. If even the "me" disappears, many may awaken instantly and leave the realm of meditation.
Thus, the vacuum feels like a threshold, with many people stepping one foot in only to be bounced back out. But when meditation penetrates deeply enough, one inevitably encounters this barrier.
Without entering the empty realm, it's impossible to seek a higher realm of cultivation. Hence, some are blocked before this threshold; while others, with great resolve and courage, step through, though they may also fall into the vacuum.
He Kao hasn't had this experience, as he's only practiced the Observation Method for several days, far from the realm of "All Five Aggregates are Void."
