Flat/ Round Earth Theory

My belief was that our eyes 'see' the earth as flat because, firstly the earth is so big and we are so small, secondly our vision is not strong enough to see beyong the horizon.

The evidence that the earth is round includes the following: He created the heavens and earth for a true purpose; He wraps the night around the day and the day around the night” [az-Zumar 39:5].

The word yukawwir (translated here as “wraps around” means to make something round, like a turban.

It is well-known that night and day follow one another on earth, which implies that the Earth is round,

because if you wrap one thing around another thing, and the thing that it is wrapped around is the Earth, then Earth must be round.

The Earth is obviously 4 dimensional... how else could you go in a straight line and end up back where you started?

It's not that our vision isn't strong enough, it's that the Earth is between us and things that are beyond the horizon.

. Even people will 20/20 vision cannot see flat miles and miles and miles away.

By going round it. Gravity clearly holds us down. But to be fair, you have a valid point, just not logical if it was really 4D, gravity might still apply but there would have to be an edge somewhere

Oh I see what you mean. Hmmm. I still disagree though, if the earth was flat, our vision can only span so far. Even people will 20/20 vision cannot see flat miles and miles and miles away. And things become smaller by distance so you wouldn't see everything as they stand when you first look ahead, you would still have to move forward

Disagree... spacetime is 4D and that doesn't have an edge.

Of course they can! How do you think we can see the sun, the moon, the planets, the stars? The latter are so far away that their distance is measured in light-years, rather than miles.

Oh sorry I'm completley mistaken, I was thinking of something else. Can you explain to me what 4D is?

Human vision isn't limited with respect to distance from the things we're trying to look at, although faraway objects become more difficult to distinguish from each other. Our view of them might be blocked by closer objects, or eventually the air itself will block our view, because air isn't completely transparent.

If the horizon was just the hard limit of human vision, we wouldn't be able to see the sun, the moon, or the stars, which are much further away than the horizon. On a clear day, at sea, you can see for miles and miles and miles, but then vision suddenly stops at a very clear boundary where the Earth is between you and what you're looking at. If the world was flat, the horizon wouldn't be as sharply defined as it is - our vision would just sort of fade away into a hazy mistiness at long distances.

Human vision isn't limited with respect to distance from the things we're trying to look at, although faraway objects become more difficult to distinguish from each other. Our view of them might be blocked by closer objects, or eventually the air itself will block our view, because air isn't completely transparent.

If the horizon was just the hard limit of human vision, we wouldn't be able to see the sun, the moon, or the stars, which are much further away than the horizon. On a clear day, at sea, you can see for miles and miles and miles, but then vision suddenly stops at a very clear boundary where the Earth is between you and what you're looking at. If the world was flat, the horizon wouldn't be as sharply defined as it is - our vision would just sort of fade away into a hazy mistiness at long distances.

Only mathematically. If this is what we live in (and we believe it may be) no wonder we sometimes feel sick, lol. https://en.wikipedia.org/wiki/3-sphere

Bit like when you forget your glasses, lol. If you watch the Titanic movie, it's noted that the lookouts didn't have their glasses. No wonder it crashed.

I think the flat earth theory primarily stems from 2 thoughts
1. That you should be able to see the curvature of the Earth
2. The curvature of the Earth should prevent you from seeing certain sites from certain places.

The thing is you won't be able to see the curvature of the Earth unless you are far enough away to see the whole circumference of the Earth simply by symmetry.
Also when you see this footage that shows "no curvature" there are a couple of very reasonably explanations.
1.Its over the sea. Light travels in a straight line when it's in a vacuum, not when it's in air - especially air with a lot of moisture in it. If you submerge your foot and a bit of your leg in the bath and look at your leg it will appear kinked. This is because light travels significantly slower in water. When light travels over the top of the sea it passes through lots of water droplets, which will help curve the light around the Earth.
2. It's over land and the Earth isn't a perfect sphere. Some parts of it are pretty flat, some bits are more curved.
3. You aren't taking the photo from the ground, you are taking it from approximately 5 ft up and taking photos of skyscrapers. That's can be enough to see beyond some of the curvature of the Earth.

If you're confused just think about the sun setting. Does the sun get smaller and smaller (ie getting further and further away from our point on a flat earth) or does it stay pretty big and seem to disappear down under the horizon?
If the Earth were flat you should be able to see the sun over Asia from the UK at night using a telescope, yet you can't.