i live in the mountains, high high plains 7-9k feet above sea level.
when something travels overhead, it bows and curves.
if something is flat, no matter if you are BELOW - AT - ABOVE SEA LEVEL, it should appear the same.
the fact it does change as you go UP and DOWN is PROOF of a SPHERE!
don't let the stupid people fool you!
And, don't let them aggravate you. No one's going to convince them, even if they were taken into space to see it for themselves. They would say, "It's a trick! They did something to the windows! That's not really the earth!" People believe what they choose, even if someone would rise from the dead, as it were. Just have fun with it.
I believe in a God whose grandness is capable of producing the kind of universe that astronomers from Galileo on up have described. A universe so terrifying large, with billions (if not more) galaxies -- GALAXIES, not just stars!!! -- in a space at least in the billions of light years wide... Just trying to fathom 500 light years one night started to terrify me. It's HHUUUUUUGGGGGEE!!!!!! Too big for human comprehension. Imagine the flippin' galaxy!!! And, then the distance to our nearest galactic neighbors!!! Never mind across the known universe!!
God is GOD. He is quite capable of producing a universe of incomprehensibly more grandeur than that stupid, infantile flat earth / dome nonsense.