Oneness is the real name for Heaven; it is a place beyond all dimensions, which are all created from consciousness vibrating at different speeds.
Within Oneness, because it is beyond anything within the Maya's dimensions, i.e. infinite time, matter, physics, etc....
Everything within Oneness is in a state of not even formed yet; often people see what they expected to perceive as in a realm of pure consciousness, it becomes manifest.
That is why only those who've attained a state of Nirvana (Øneness) are welcome there; as in a selfless environment, it is possible for all to be at one with the Source....
The moment anyone takes, and becomes self orientated, they fall back down here.
Everything that is here, is a construct (Maya) from the CPU, it maintains the mathematical grid (Matrix) that sustains the reality we see around us.
Easier way to understand it, is a Massive Multiplayer Online Role Play Game....
The material universe is made manifest by the CPU, the core surrounding it is Oneness, as it all unifies the program at a quantum level, thus we have this game to exist within.
We are unique characters within the game, and as a part of Oneness we exist; as we become more separatist, we no longer exist in a physical sense or are reborn back into the game, until we realize if Oneness isn't, we can't exist.
Oneness is in the moment before time, imagine a pool of consciousness with no ripples; it can create what ever it wants, in which ever direction the pebble is thrown....
Now if the pebble was never thrown, then nothing would exist; this is the infinite state Buddha, etc, seem to be talking about, a state of Øneness (Nirvana).