We perceive concepts like "house, "dog", "the color yellow" and apply it to the world around us. If you removed the concept of "house" you'd be left with a stone square, but even "stone" and "square" are concepts that we apply to this reality, it doesn't have any differentiation between one set of atoms from another, one set of geometrical patterns from another.
It's a matrix that we ourselves apply to the world around us, it's not this world.
I always believed this matrix to be born out of evolution in this world. We developed the concept of "square" because it would be evolutionarily beneficial to recognize cubes from planes, we recognized different types of material because it would be evolutionarily beneficial to separate stone from dirt. Same for other concepts such as "shelter" and so on until more abstract concepts.
But lately I've been delving into more /fringe/ topics, and stumbled upon the opposite idea. What if this matrix we apply to the world, comes from outside this world?
That is, concepts such as "house", "dog", "the color yellow" are pre-existing on a higher plane (the astral, 4D etc.) and we're just applying these concepts to the world around us.
There exists a concept of "home", a concept of "geometric square", a concept of "solid material" outside of this world and it is us applying this higher system on a lower existence.
We might have (if you still believe in evolution) developed to perceive squares, but squares come from elsewhere, we're just filtering this meaningless world to perceive squares, which do not really "exist" in this world.
What does /fringe/ think? It's a bit autistic but I hope I explained it properly, it's been bugging me for so long.