Difficult Questions

Questions:

i) Do human beings only pose problems they can eventually solve?
ii) What is the difference between small objects (particles) and large objects (galaxies)? Is "smaller" and "larger" logical relation with respect to us, poor, ordinary humans?
iii) Are entities really separate or everything is just ONE interconnected (meaningless in this context!) thing? Is each physical entity "like a brief, disturbed drop of water from an unbounded ocean". Is the real idea that "the goal of enlightment to see intuitively that the distinction between the self and the Universe is a false dichotomy (Maya)?"
iv) Is there an "unreasonable effectiveness of mathematics in the sciences"? Or is it just "derived from experience as a generalization of observed regularities"?
v) How is the world "really" like? Thought experiment: Imagine our eyes only saw radiation on the x-rays part of frequency spectrum.
vi) Is space a physical entity or the only important concept is the relation between entities? In other words, are entangled particles separate "in space" but "inseparate" in the "relational world"?
vii) Is there a purely mathematical reality where probability waves and other things inhabit and there are no physical restrictions but only mathematical ones?