"Everything which comes into-existence proves precisely by coming into existence that it is not necessary, for the only thing which cannot come into existence is the necessary, because the necessary is. Is not necessity then a synthesis of possibility and actuality? What could this mean? Possibility and actuality do not differ in essence but in being; how could there from this difference be formed a synthesis constituting necessity, which is not a determination of being but a determination of essence, since it is the essence of the necessary to be."