The four catagories of existance, non-existance, both existance and non-existance, and neither existance nor non-existance, are spiderwebs among spiderwebs which can never take hold of the enormous bird of reality
As you learn to leave alone the activity of unconsciously trying to be the mindbody that you think that you are - the mindbody that this "you" is currently flowing through - and you learn to move as this one that you truly are - this "you" of you; the very heart of existence - steadily, consciously and momentarily, the continuity of the ever deepening of this innermost as it keeps on entering its manifestation, through this mindbody that you find yourself flowing through, allows you to simply bubble in the sheer joy, pleasure, peace, delightfulness and stillness that this "you" of you is.
When perception is stronger than mindfulness, we recognize various appearances and create concepts such as “body,” “cat”, “house,” or “person”… On some clear night, go outside, look up at the sky, and see if you can find the Big Dipper. For most people that is a familiar constellation, easy to pick out from all the other stars. But is there really a Big Dipper up there in the sky? There is no Big Dipper up there. “Big Dipper” is a concept. Humans looked, saw a certain pattern, and then created a concept in our collective mind to describe it. That concept is useful because it helps us recognize the constellation. But it also has another, less useful effect. By creating the concept “Big Dipper” we separate out those stars from all the rest, and then, if we become attached to the idea of that separation, we lose the sense of the night sky's wholeness, its oneness. Does the separation actually exist in the sky? No. We created it through the use of a concept. Does anything change in the sky when we understand that there is no Big Dipper? No.
Still others commit all sorts of evil deeds, claiming karma doesn’t exist. They erroneously maintain that since everything is empty, committing evil isn’t wrong. Such persons fall into a hell of endless darkness with no hope of release. Those who are wise hold no such conception.
Bodhidharma (c. 440 AD - 528 AD)
Source: The Zen Teaching of Bodhidharma: A Bilingual Edition