The power of life causes the snake to shed its skin, just as the moon sheds its shadow. The serpent sheds its skin to be born again, as the moon its shadow to be born again. They are equivalent symbols. Sometimes the serpent is represented as a circle eating its own tail. That’s an image of life. Life sheds one generation after another, to be born again. The serpent represents immortal energy and consciousness engaged in the field of time, constantly throwing off death and being born again. There is something tremendously terrifying about life when you look at it that way. And so the serpent carries in itself the sense of both the fascination and the terror of life.