it's ... hard to describe in words. =) there's no way i can do it justice really. but i'll try.
in one word, it is emptiness or void. in another, it is compassion. or you could say, there is only light.
void itself by its own nature produces the infinite phenomena of appearance in its playing or self-creation.
the infinite light is only one thing, but it also like to play, and so it splits itself out into many different things. in this way separation comes into existence and this makes pain possible. but at the same time, there is no separation.
there are many worlds. they are connected by a shared structure and there are gateways between them.
absolute reality is like this - there are 'levels'.
on this level, our reality is real. on a different level, our reality is a fiction that exists as symbols within some 'mind'. even on the higher levels, there are always higher levels so you can always 'meta out' or 'break the fourth wall'. but at the same time, it can be sort of circular so that the lower levels are also over the higher levels. all the levels are within one another and penetrate each other, which allows for gateways and doors to exist. there are infinite levels, and causes on one level can have effects on the others. each level requires all of the other levels to exist and would not be complete without it.
within any given level, there are infinite worlds. everything that can happen, does. your mind follows all possible paths simultaneously, and can shift and move between different possible worlds according to your intention. all of the infinite worlds are inside one another yet also contain the worlds they are inside of.
if i look at a tree now, i just see a tree.
but at the same time, i know that the tree is 'not real' in some deep sense.
but at the same time, i know that every cell, indeed every atom within the tree contains an infinite fractal of other worlds, other beings, other minds.
each part of each world in each level or realm of reality reflects all of the others at once and is created in that reflection. none of them could exist in any way without all of the other also existing.
but at the same time, all of that infinite play of stuff is also not real. all of it is 'one'. truthfully, it is one 'mind'. sort of like a crystal that contains everything that can exist, everything that cannot exist, everything that both exists and does not exist, and everything that neither exists nor does not exist.
okay, so roll up all of that 'weirdness' into ONE overwhelming, visceral, non-conceptual awareness that is always present in your mind. indeed, it is your mind and there is no 'you' apart from the light.
or you could just say, "suchness". sort of like, que sera, sera.
now, since i used prose, this is a very poor and meager explanation which may not make any sense. a better explanation would simply be wild shriek! or a gunshot, or a bell sound, or a rainbow. the best you could do with words would probably be a poem.