Consider that before the world appeared from the Big Bang there was a Singularity, a state of no time, no space, no form, no change, no limits. For a True Singularity there is nothing else. It is Pure Perfection, Flawless, Pure Clarity, Completeness, Emptiness, Nothing, Everything, Wholeness, Peace, Oneness.
Similarly, imagine Infinite Light. It is Pure Imperceptible Clarity. It's not something that can be seen. For Infinite Light to be perceived it needs a contrast. It must seem to divide itself into what is like it and what is not like it. So a light appears in the darkness. In creating the perceivable world, the Singularity seems to divide itself into its likeness and its opposite. Interaction ensues and a multiplicity branches out. It sounds a bit like the Adam and Eve story...
Anyway, the Singularity seems to scatter itself into a range of what is close to it and what is far from it. Infinite Light appears as a range from bright light to darkness. This pattern multiplies throughout the universe. We can see it here in the formation of trees, flowers, and the fingers of human hands on human arms from a central torso. The universe seems to scatter outwards from a central point, and the pattern repeats.
What we see in this world of time and space is what seems to be an Infinite Singularity divided through dispersion and reflection. Oneness becomes one and many. Pure Light becomes light and darkness. Perfect Harmony becomes harmony and disharmony. Order becomes order and chaos. Peace becomes peace and war. Life becomes alive and not alive. Or so it seems.
Well, it's not what it seems. The opposite of Reality cannot really exist. Darkness doesn't really exist. Opposites don't really exist. The Light of Life is Infinite. There is no real end of this Infinite Life. Life only seems to come and go in a play of opposites. There is no distance in the Infinite, no far away or near. There is no past or future in the Timeless. The timeless Singularity can never end, or begin. The Singularity didn't really end when the perceivable universe began. The Singularity remains exactly as it timelessly is.
So what was there before time began? Time never did begin. The Singularity never changes. It only seems to change. There is no past or future. Nobody can experience these, only conceptually, not really.
And where does this universe end? It doesn't. It appears in the Infinite, stretches out across the Infinite, and returns to the Infinite. But it doesn't go anywhere. Nobody can ever experience being anywhere other than Here. 'Over there' is only conceptual. Distance only appears far away. What seems far away is only ever experienced right Here.
The Timeless Singularity can never become anything other than that. The world is a play of reflection and dispersion within the Infinite Consciousness of the Singularity. The Singularity is Reality. Dispersion and reflection are illusory. Yet there is nothing other than Reality.