I have this analogy I like very much, of the puzzle where there is one empty space and the trick is to use this negative space to shift the pieces around until they create a “whole” image. However, the catch is the fulfillment of this whole is dependent upon the missing tile, the negative space, which both allows the image to be “made whole” and prevents it from ever being “fully” or “truly” whole. I think this is a good analogy for the structure of life. There is an all too obvious negativity, a lack, what many refer to (accurately I think) as “the void”. But, this same void is what allows us to really live. If we lived in some type of void-free utopia, we would be like animals, mere life forms who function purely on instinct, never really being aware of anything. The void is what both allows us to live and what we meet when we die. It has an almost sacred aura around it, it is in the void where we imagine we see things like God, the Devil, witchcraft, the supernatural, etc. It is the dark itself, and we are all naturally afraid of it, because, by its very nature, nothing is in it, and this precisely means that anything could be in it.
– Slavoj Žižek, Unfiltered Thought: A Political Philosophy