Your two eyes can show u only to some limited distance.
What these two eyes are seeing, is it real?
U say that u can see the sky, but does sky really exist?
Sky is what your eyes are seeing, the limited way.
All that is around u is space.
When u look upwards, your eyes can see only the limited space and that limited, u have called it 'sky'.
Don't be attached to the limited, go for the unlimited....