Life in a box

Suppose we were to imagine that presently, instead of being on Earth surrounded by space, that we are instead in a cardboard box. In that box we are consumed with examining knowledge but only knowledge of the boxes interior since we can’t penetrate it’s burrier. If therefore we have only spent time within the boxes interior and have been therefore unable to see past the cardboard surrounding us then how much might we trust in unseen things beyond and outside of where we currently are existing. 

 If we were to try and estimate beyond it's walls, only having cardboard to imagine now, we would be forced to reluctantly retreat within a belief that finding anything out outside of ourselves seemed impossible.  Yet outside the cardboard box, we people now know this because we live outside that particular kind of box, here there are trees, ponds, rivers, streams, flowers, architecture, rainbows, sunsets, while other thinking creatures wait to engage in dialogue. There are sights and sounds that would take many life times to experience here. A further unknown here too is that there is deep space all around us.  

Now think of where we really are ourselves therefore. We presently are in that same kind of cardboard box like existence here too then. Yet beyond us, beyond everything we can’t see now, there might be more then common sounds; there might be even greater sights more mind-bogglingly large; there may be strange and unusual sunsets; distinct unheard of worlds; truths hidden and found existing far out beyond us.

This is commonsense but what is it really like out there? What significant something else might there be? Should we trust that whatever we don’t know about out there that in that unknown place something does exist and is larger then our imaginations can presently grasp.