I believe that there has to be an explanation for everything.

Where from this universe came. There has to be a reason and explanation for everything, even if there's a higher power involved.Maybe God concept represents a different kind of sentience. The rules and properties of that layer of world may be different from ours, still they have to make sense, even though in a way that might not be comprehensible by us!

One idea that's doing the rounds of my mind is that what if there is no such thing as a fixed universe in which we dwell. What if the world as we see it is a sum of everyone's individual 'sight'. The sum may be done in a very different manner, using very different rules (e.g., sum of vectors follows a completely different concept from sum of scalars).

What we perceive as physical substances may not be existing as 'absolute' entities, but are there as a consequence of our own perception combined with perception of others with the basic framework of the world!

So, what can it be?

Following this line of reasoning, we can conjecture maybe a few theories. One is explained below.

What if the fundamental building blocks are made of some stuff that is not physical at all (in the current sense of the word "physical"). What are thoughts made of? What if everything is nothing but a manifestation of this core stuff!

So let's assume for a moment that this stuff is the "source" of everything, including the physical world as well as the thought processes. What if the world as a whole is a set stage! All the choices and alternatives exist simultaneously without any considerations of space or time! It's just that the observable world that manifests is the just an overlap of individual "choices" (even the choices are not independent, if we assume this reasoning).

Maybe the substance that thoughts are made of is the closest thing akin to the substance of this core stuff. In other words, thoughts are almost raw forms of this core substance, rest all are manifestations. We assume that thoughts are only generated by living beings (as per our current definition). What if it's not true. May be there are other ways that this same effect can be achieved.

It may be that the whole world may be nothing but a spectrum of various possibilities, all existing simultaneously. Our 'perception' of it gives it a physical reality. What this means that nothing has any existence until one perceives it in some way or the other. Also it does "not" imply that just by thinking we can change whatever we want. The stuff that we possess is only a small part of the whole stuff. Our perception is not ours alone, but a kaleidoscope of everything and everyone's perception around us. As we think and perceive it, we modify it!