Advaita Vedanta advances the upaya that only one experience can arise at any one time. In this line of inquiry, it assumes that time exists, and it doesn’t take up non-ordinary cases. These will be revisited at the appropriate time.

Assume for the time being, then, that time exists, and assume for the moment that experiences appear in what may seem like a separate space–namely, Consciousness.

Now, common sense would still insist that there could be two experiences that can occur simultaneously and that these experiences could make “horizontal” contact with each other. After all, can’t a thought occur just when a sensation occurs? And can’t a thought initiate a physical movement?

No to both.

Deeper exploration will reveal that experiences occur, and can only occur, successively. And no experience, it will turn out, can ever make contact with another experience. No thought can touch another thought; no sensation another sensation; no perception another perception; no thought a perception or action; and so on.

Grant as much. Yet why does this matter?

Because this exploration will pave the way for showing, directly, three things. One is that there is “no room” for a separate, ego self to exist: there is no room for a doer, a knower, or an enjoyer. Another is that sat (Reality) is “the support” for all objective experiences. A third is that cit (Consciousness) is the active principle that “lights up” all experiences. And, it will be seen, cit is sat.