Ray Linville (email@example.com) writes:
Perhaps this is already been brought up, but what if the Covenant are to the Forerunner like the S'pht are to the Jjaro? Perhaps the Covenant were servants, or perhaps a lower caste that was left behind when the Forerunner vanished.
After centuries of being gone, the Forerunner were elevated to godhood in the eyes of the Covenant. Now that they've acheived spaceflight, they roam the galaxy uncovering establishments left behind, but they recognize them as belonging to their 'gods' because they are familiar with Forerunner architecture and technology. The purpose of the Halo is interpreted as the will of the gods. "Your destruction is the will of the Gods...and we are their instrument."