They cloud the pure knowledge gathered by all of us through all the ages. The real truth is so vast, that it cannot be encompassed by limited thoughts and beliefs. Because we could be shattered by it, for our own safety we have accepted a lot of distortions in the form of learned or picked-up limitations. It also reveals why the same invention can surface in different minds in far-away places at the same time. The thrilling thing about the late twentieth century is that we recreate in a limited material way the spiritual worlds.
Speed is the great issue.
But we have forgotten that we could be everywhere all the time , without any means of physical transportation. Still, it might turn out to be a new and promising step. Everything is simple. Fortunately, more and more important breakthroughs acknowledge this simple fact. It frees us from un-needed complicated intellectual mind constructions.