I have never really understood why we wouldn't be able to comprehend everything in existence. There is a lot that is unknown, but how can we say that something is unknowable? There may be unknowable things with today's technological tools, but as technology advances we'll have more powerful tools. At what point have we ever given up on our search for knowledge and say, 'well, I guess we'll just never know...' By what criteria can we know if something is not just unknown, but unknowable. We largely learn by metaphor; we use an example of something known to explain to someone by comparison something they don't yet know (i.e. using visuals of spheres with spin and lines to understand how the standard model of QM works, or imagining tiny vibrating strings with different tensions to understand string theory, etc.). If we could travel back in time to ancient Greece and showed Aristotle a laptop, it would perhaps seem like magic at first, but if you explained it's operations and functions, materials, forces step by step, he would totally get it. I can't even imagine knowledge existing that I wouldn't be able to comprehend (I realize the irony of that statement) if it were broken down for me, step by step, using metaphor I understand. Am I off here?