Everything we know is learned.
Everything we percieve is filtered through what we know.
There fore to "see" anything, we must first assign it a value relative to what we know. It must be like this, or similar to that.
There is a story of a tribe that could not see blue ... they did not have a word for it, had never "known" this color and because of that, they literally could not see anything of that color. It simply did not exist in their perceptual model.
What are you not seeing? What are we all missing from our realities? Think of the possibilities. Infinite experience outside of our realm of perception, anything and everything you could possibly imagine, already existing in it's own strange space of reality ... yet outside of our perception simply because we can't imagine it's existence.
This is why opening our minds is challenging, we are attempting to experience something we don't believe exists ... or at least have never experienced before. It is an act of divine will, an opportunity to create something in our own reality that has never existed before. Literally gods of our own perception we can make something out of nothing. Something appear out of thin air. Where was it a moment before. Surely it did exist in one form or another, yet imperceivable to us it now exists in our reality therefore now is real. Is this manifestation? Is this the act of creation we are all so adamant about now ... surely it is. Then manifestation is not creation but rather a focusing of attention on a different experience ... tuning to a different channel so to speak. We have the ability to do this ... it has been proven time and time again. Why do we limit ourselves to so few experiences?