I always know you were right on the money!;-)
I liken it to God hid a key to heaven in the many faiths of one true good God of peace and justice. Each key, although different, opens the different pearly gates which all open up to heaven.
I see it like this:
we have a pyramid with four sides. They are all equal and completely different, but the higher up you go on one side, the closer you get to the other sides. Finally, at the apex the sides merge and actually disappear. You realise that the source was the same.
This is the true symbolism of the pyramid.
This image gives me immense peace of mind and soul.
Truth, Beauty, Love