Unspeakable things: What can be said, let alone understood, about the unsayable?

When something is ineffable, it means it is beyond words, too great or extreme to be described in words. And life’s most meaningful experiences can leave us tongue-tied. Does that mean there is something called ineffable knowledge? And if there is, what can be said, let alone understood, about the unsayable, asks Silvia Jonas writing in Aeon Magazine.