Does “nothing” exist?
No, nothing does not exist, concretely. It’s an abstract thing. A name for the opposite of ‘everything’, that inevitably exists and whitout which, we could not live. Everything and nothing are clear opposites. Everything is relative, but nothing is not, everything has to exist, but nothing can not. Almost exactly like black and white, that are spectres. White is all light, while black is no light. Therefore you can say white and black are symbolic colours for everything and nothing.