Universal Questions

Have you ever thought about what lies beyond our universe? I know. By definition that the universe is everything, but for me every now and then I wonder if there are defined boundaries outside of our bubble. There can be many possible answers but unfortunately none of it can be validated right now.

I have always been fascinated by what I couldn't see but imagine. Since there are so many theories on what the tiniest of our worlds are, I wanted to think about and postulate about what could be on the outside of the universe. 

I have always thought that the universe is like a bubble. From the beginning of the big bang it has expanded into the universe that is today. But what is the bubble expanding into and how can 3d space continue to grow near exponentially over 14 billion years? I have a hard time understanding a physical entity without limitations, in this case it is the universe. 

The only thing that I can come up with is that this reality is one of several dimensions that we are unable to fully comprehend. Just like how the jump from 2d to 3d is more complicated, i think that from 3d to 4d and beyond is insanely complex with the only way we would be understand it is through mathematics. 

I believe that we are creatures that are inhabit one of many dimensions blissfully unaware of more complex structures and worlds beyond our own. It is kind of like an amoeba with its limited scope trying to comprehend a human. The universe is a vastly interesting place with a lot more questions than potential answers and I hope to learn them all one day. 

Or maybe its all someone's dream...