Flat Earth is a reference to perception, everything looks flat if seen with one eye. Sight with two eyes gives us 'depth perception', which indicates depth is only a perception. The image above is flat from a certain perception, 3-D from another. The 3-D is an illusion. Your 3-D world is likewise an illusion. These are all esoteric 'secrets', i.e. what the Freemasons secretly teach each other. Have fun with it, I guess.
Responding to my post to point out that when the Freemasons say you all are too stupid to understand their secret teachings, this is exactly what they mean. 99% of you are unable to see the simple truth of this stuff about perception.
That's why they rule over you. They see. You do not. Really kind of funny.
Anyway, to those few of you here that are actual spiritual practitioners, take this as a lesson: those that can't see simply can't see. Those that can, can, or can once they are shown how. This is why those you try to teach often cannot learn: they truly are NOT MEANT TO. Sucks!