Comment: I was pondering...

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I was pondering...

...the saying 'the four corners of the world', and it kind of makes sense when describing the point furthest from your position on a globe. If I draw orthogonal circles, intersecting at the point I'm standing, wrapping around the sphere, these four lines of the circles meet on the opposite side of the globe from me. You know how we call the point where the state lines between Colorado, Utah, Arizona and New Mexico meet 'Four Corners'? If you envision the four corners meeting at the point opposite the globe from you, could that not be a way of getting the point of 'the ends of the earth from our perspective' across, regardless of whether it was 2D or 3D?

In any event, it's probably just a figure of speech, conveying the ideas of extremities with respect to one's position.