The so-called mental process is no sort of event, one that would be describable in spatio-temporal or otherwise world-illustrating terms. It is multiple in ways that are impossible to grasp, but which show up in experience in indirect ways, it is a form of multiplicity that is not schematisable, much less countable. If we were nevertheless to consider it as a plurality of dimensions or layers or strands it could be said that any one of these alternatives can wake up at any time and so become the 'I' and the 'here' of the experiencing; if moments of being exist in any independent fashion, as is thought by some who seek to objectify the subjective, then they are open to many possible ownerships. To awaken one of them is to choose one set of potentials, to resume a track, but if each track is a world unto itself and if every world is a track of its own, then individual worlds have no power or motive to bring themselves about, they have no core - you must say they are chosen because they can't choose themselves. To attempt to ground yourself by anchoring the mind in 'what is', in this reality right here in front of you, is no way of approach to the more encompassing reality, however beneficial the exercise might prove in this one. The subject's precious reality-sense can be expanded in all sorts of ways but since it is inherently pointed at an objective its findings will only be more of the same, lost in the leaves and flowers but not suspecting the root.