Everything stands for something greater than itself. Go pick out a tree in your backyard and describe it to me. Your definition will be incomplete. THere will always be something more to the tree than the definition embraces. Ultimately, it stands for something more than itself.
Same with human "be"ings. To be, is to stand for.
There is a “super” reality that we all know exists but that for which language is inadequate. From our homes, in front of our computers, it is easy to discount this awareness. To view the ineffable, the mystery, with callousness or indifference. But (again, as Heschel has said), who can stand underneath the night sky or at the lip of the Grand Canyon and remain indifferent. What is the purpose of awe, wonder, radical amazement? To be aware that all is infused with a mystery that we can never understand is, I think, one of the fundamental purposes of religion.
Whether it is Judaism, Christianity, Islam, gnositcism, wiccan…, or even monotheism in general, each is a framework desgined to provide us with the ability to comprehend the mystery that is beyond our ability to apprehend.