Inception is all about dreams, mainly subjectively to create dreams and make it happen. It doesn’t matter the inception itself worked or not, but the behavior is furiously dangerous.
I guess there is always the "knows" and the "unknowns", as simple as us, if something that we can't figure out, we just give up. But people who has great IQs, probably they will go further. The reason we had huge confusions about the time, space, and universe, because we will never get the chance to look down from God's perception, or the whole angle, and also, there is no smallest element, and based on that, there comes the space is based with nothing, but also something. from nothing goes to something, that is easy to understand, but from something goes to nothing, that will be hard to comprehend, because we were trained by that logic.
I believe that things could be converted, in the world of reality, for instance, light could be converted, from both directions. I also believe that at one point of time, dimensions can also be converted. That explains we go to the dream from reality, and wake up back to the reality. “something” represents the reality, and “nothing” is the dream.
In the world of reality, we follow rules which obeys the Euclidean Space theory. There are logical consequences when we disobey the rules. In this world, the souls are attached to the flesh bodies, and the bodies are attached to the surrounding hoods, there will be no position to carry the soul or the minds when the flesh is dead. Also the flesh carries the feature of appearance, that reflexes the images in the dreams.
About “knows”, “never ever create your dream with memory”, what we saw in our dreams are illogically and partially pieces of memories existed, appears and being edited into wonderland. I had too much scary dreams before, and now they are like genovariations invaded my life. I feel dead again every time when I wake up, but who knows, the so-called world of reality, could be the continuously dream with the Euclidean Space, the next day just follow the previous day’s memory; the dream is totally different wonderland world, with non-Euclidean Space, it could be Manifold, or nothing at all, and it could also be not continuous, but fantasy. So therefore, there are not only 3 dimensions in the world, there are more. The mysterious part is the connections between each, and unfortunately that should be the “unknown” part, like the fractal structure, we are just worms.
