You have noticed that everything as Indian does is in a circle, and that is because the Power of the World always works in circles, and everything tries to be round..... The Sky is round, and I have heard that the earth is round like a ball, and so are all the stars. The wind, in its greatest power, whirls. Birds make their nest in circles, for theirs is the same religion as ours....Black Elk, Oglalla Holy Man