The other part of the answer is more difficult to explain. You may not understand this until you get older. Another word for empty is nothing. Now the concept of nothingness is actually quite mind boggling. What exactly is nothing? As we have seen an imaginary box in space cannot be possibly be empty but at the very least contains some vacuum energy. So we can’t quite say that there is “nothing” in the box. So what is the concept nothing as it relates to outer space or the universe? Even if the box didn’t have a vacuum energy so that it was really empty, space itself would still exist. That is, we could still imagine a box with width, length and height out sitting anywhere in the universe. But what if space itself didn’t exist? Then not even an imaginary box could be constructed because space itself wouldn’t exist and wouldn’t have any dimensions!

I told you this was mind boggling. It boggles my mind. Logically such a possibility exists and is called the “null set” by mathematicians who use the symbol  as a placeholder for the null set in their theories but when applied to reality nobody really knows what this means. In essence this goes to the core of existence or to put it another way “where did we come from?” Our current theories (mostly the “big bang” theory of the universe) purports to describe how the universe evolved after about the first half second of existence but where the universe came from in the first place is one of the great mysteries of life. Since we are here, we must have been created somehow but the question arises “how can you create something out of absolutely nothing?” As far as I know there is no known scientific answer to this question.

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