As Mad_Gouki states:
"0‽ is that it represents, philosophically, the absoluteness of all things(god, the universe), or mathematically, the base state for a system, from which the other values are based."
Taking this definition; could the idea of Enlightenment as expounded upon in Buddhism and Hinduism be actually a simplistic attempt to explain cuil? I submit that these cultures have been attempting to define 0‽ for some time, but lacked the proper theory to give it any true realization.
That being said; I think that 0‽ is what the Eastern religions have come to call "enlightenment", where all parts of reality are understood.
Meditation as a means of reaching 0‽ is most definitely an exponential endeavor. As one works to encapsulate reality and approaches 0‽ from either the negative or the positive*, one must relinquish the logic and basic mechanistic processes that allow us to properly deal with the world around us.
*As a meditative practice, reaching 0‽ from the negative spectrum would involve pretending that you are, in fact, a tree. Your experience as a tree trying to come to terms with the fact that you are conscious that you shouldn't have consciousness then forces you to move towards 0‽.