As we know, a circle has neither beginning nor end. The ball is moving and we cannot predict which way it will roll up. We would like to predict, but are not given it. With our life, actions, thoughts, deeds, we can mark the trajectory of the ball, building the surface of life to one or the other way. The surface can also be balanced horizontally, so that the ball balances on the edge of life... But, there is no guarantee that the ball will roll along our intended trajectory or balanced horizontally.