They make you omnipotent, omnipresent, and all of these "omni" things because they give you all of this control. And then when you have them all together they make you God-like. And these give control over very specific aspects of the universe and life in the universe. You have a mind stone of soul stone and so on. So you have these six stones that have powers like they can control time, they can control space and other elements like that. So Thanos, the big bad in the movie, is actually after these elements because he wants to do a certain thing with them and they will give him the power to do that easily. And they give the user, if the user is up for it, the ability to control various core elements of how our universe works. We're not told, but we know the very early part of the universe as we know it these stones came into existence. These essences were created or maybe they were created from something else that came before.
REAL AVENGERS INFINITY WAR TRANSCRIPT MOVIE
I think we learn a little bit more as you go through into this "Infinity War" movie that somehow they're left over from the creation of the universe around the time of the Big Bang which is 13.8 billion years ago.
Clifford Johnson: The infinity stones are this set of artifacts that have been left over from something that came before.