Something just occured to me.
I don't think this show is going to answer any more questions. Sunday will just be an action-fest.
After all these years I'm afraid that "Glowing light of life" is actually the final answer.
No explanation on who Jacob's mother was, or who built the statue, or why Jacob can manipulate destiny and time. No deeper origin on why MiB became the smoke monster, or what are these rules have been or why people follow them or this or that. No explanaton of where the various Other's came from or what was what. No explaantion of what the magical light is or where it comes from.
In the end it all came down to "It was magic."