Crazy Horse dreamed and went into the world where there is nothing but the spirits of things. That is the real world that is behind this one, and everything we see here is something like a shadow from that world.... It was this vision that gave him his great power, for when he went into a fight, he had only to think of that world to be in it again, so that he could go through anything and not be hurt
Black ElkWhen a vision comes from the thunder beings of the west, it comes with terror like a thunder storm; but when the storm of vision has passed, the world is greenier and happier; for wherever the truth of vision comes upon the world, it is like a rain. The world, you see, is happier after the terror of the storm.
Black ElkI was standing on the highest mountain of them all, and round about beneath me was the whole hoop of the world. And while I stood there I saw more than I can tell and I understood more than I saw; for I was seeing in a sacred manner the shapes of all things in the spirit, and the shape of all shapes as they must live together like one being. And I saw that the sacred hoop of my people was one of many hoops that made one circle, wide as daylight and as starlight, and in the center grew one mighty flowering tree to shelter all children of one mother and one father. And I saw that it was holy.
Black Elk