Really, we don't know either. It started as a joke and has become something of a minor cult of sorts within the GMS. Nevertheless, we are wholly devoted to it and its hunger for ore.
Occasionally, Ze Arch sends us the embodiment of its spirit in the form of large, blue, glowy, jelly-like ships. We've discovered that The Order tends to like to help said spirits back on their way to the ephemeral beyond so that it may rejoin the cosmos and watch over us always.
As Jack Ramirez has learned, though, it is unwise for an Outcast to saunter up and demand respect from us if he is not to respect Ze Arch in return. Most unwise, in a fiery, exploding manner.