If there is existence, there must be non-existence. And if there was a time when nothing existed, there must have been a time before that - when even nothing did not exist. Suddenly, when nothing came into existence, could one really say whether it belonged to the category of existence or non-existence?
ZhuangziWhen an archer shoots for enjoyment, he has all his skill; when he shoots for a brass buckle, he gets nervous; when he shoots for a prize of gold, he begins to see two targets.
ZhuangziGood fortune is as light as a feather, but nobody knows how to pick it up. Misfortune is as heavy as earth, but nobody knows how to stay out of it's way.
Zhuangzi