A complete lounge topic:
A fourth physical dimension represented in visual terms. Easy to conceptualize. Easy to understand how in theory one could move in a completely different direction, out of these three physical dimensions. In mathematical terms, there's no reason why there might not be an additional physical dimension that is not time or some other seemingly non-physical construct.
Yet we can't. We're stuck here, in this place, in this framework. This is an idea that has stuck with me since childhood, and I think I drew my first tesseract when I was 14 or 15 years old, before I ever had encountered the word. Now when I look at it, I see eight points. Now the tesseract makes me laugh, there's just something about it.
Part of me still wants to go there, as if there's somewhere else to go, somewhere else to be, something more to do and understand. And I'm sure there is, just as sure as I am that I'll never reach out with my hand and get there.
I figure we all have our tesseracts.
Rain soddens what is kept wrapped up,
But never soddens what is open;
Uncover, then, what is concealed,
Lest it be soddened by the rain.