Islam being true. And if Mecca was the golden mean point, that's very convincing evidence to me.
Even if Mecca was at the golden ratio, how would that prove Islam to be true? Are there really no other religious temples around the globe that are at a golden ratio of the north pole? Or that have something miraculous about them?
If you're so gullible, then you should be amazed by the fact that the 3 great pyramids in Giza are positionned in the same manner as the 3 stars of Orion's belt. Explain THAT to me now! Isn't it a sign that Osiris is the one true God? I find it even more mind-blowing than a black cubic construction being at the golden ratio. I mean that's all you've got?
You can find something mind blowing about just any religion.
You're talking about a book that says that man was created from clay, an idea that has been stolen from Greek mythology. And that the earth was flooded in 40 days, which is clearly impossible. How would the all knowing god get such things wrong?
All it takes is to find 1 scientific error in the Quran and it's no longer written by all knowing God. A book written by such a being must have 0 errors, and I just cited 2, and I'm sure there are many more. But even 1 is enough.