Highlights:We find out that Jacob and MIB are twins.
Allison Janney kills their birth mother and raises them. She has been there forever.
MIB is favored and more rebellious, a game with black and white stones is played throughout the episode (and the series). Mother supposedly left the game for MIB to find and play.
MIB's dead mom appears to him, and shows him the other people from her ship, and tells him to go with them.
Mother says they are evil, and gives them the EXACT same spiel MIB gives to Jacob in the Season 5 Finale.
Mother shows them the Heart Of The Island. It is a stream leading into a cave with a light inside. She says all men have a little bit inside of them, but always want more. Her job is to protect that light, and make sure no one takes it.

MIB listens to his dead mother and lives with the Others. He grows up with them while Jacob stays with his mother. Jacob visits him regularly, and MIB reveals that these people are greedy, selfish, and untrustworthy.
MIB wants more than anything to get off the island. His dead mother told him there are many things across the sea, and his new mother had lied to him. He searches for the light his mother showed him as a boy at the end of the stream. He finds electromagnetic pockets instead, and digs wells. He builds the Dharma wheel and shows his mother the light on the other side of the wall. He says the wheel connects the light with the water and can get him off of the island.
His mother knocks him out, drags him up the well, fills the well, and burns his whole village to the ground.

Meanwhile, she tells Jacob he is special and is meant to take her place as guardian of the island. Jacob is reluctant, jealous, and immature, but eventually accepts. He drinks a cup of wine in front of the Light Cave and is now the guardian.
Mother returns to the caves while Jacob gets firewood. MIB is waiting for her and kills her. She says "Thank you" before dying. Jacob comes home and beats MIB up.
Jacob takes his brother to the stream. He recalls his mother telling him that if he were to go in there, he would not die. But a fate much worse than this would occur. He knocks his brother out and sends him into the light.
He does this and the smoke monster emerges from the cave like a giant smokey roller coaster. It spits Jacob's brother's body out, and Jacob weeps. Jacob carries his body back to the caves, and stages his body with his mothers for Jack and Kate to find centuries later.

Special/Key Moments:Allison Janney, ladies and gentleman!

Anyone notice the phrase she said to Jacob? "It has to be you." That is the same phrase Sayid said to Jack before he sacrificed himself. Jack will replace Jacob. I just know it.
I liked that the ritual for Jacob to become guardian of the island, or the light, or whatever, was completed with wine. She says to him, "Drink this cup... now you and I are the same." Very symbolic of the Christian's First Communion ceremony, when they drink Christ's blood for the first time, the are one with the body of Christ; or so it is believed.
Seeing Jacob grow up not only as a child, but in his adult form was interesting. He was a bit of a hot mess when he killed his brother. He was jealous of his mother's love for his brother, and got frustrated when she only gave him vague answers about the island. It makes him seem a little less cryptic, and a lot more like one of us.

The Man in Black's story seemed very Darth Vader. On purpose?
We found out where the wheel came from and why it was used in that way.
We got to see what the big deal about the island was, and how the smoke monster was created.
We were pretty much proven that the kid that appears the Man In Black is a child version of Jacob. Phew. Another one put to rest.
MIB told Jacob that maybe one day he can create his own game and create the rules for that. This clearly sets up bringing Richard and several others to the island.
I liked how the tapestry-making began with Mother. That was a nice touch.
We got to see MIB in a muscle shirt doing hard labor:)

We still don't know MIB's name! I think it's just something I have to accept, and move on. Have you ever read the book
Rebecca? The author goes the entire book without telling you the name of the main character. Rebecca is the name of the protagonist's husband's dead wife, not the main character, so you are always stuck with phrases like "...he called my name" or "it was labeled for me" or some other crazy bullshit. This episode was no different. Jacob and his mother danced around his name like a gay man would around Pamela Anderson. "My love" and "Brother" were used so much I wanted to rip my hair out!
I guess giving a simple human name to something so ominous at this point might seem trivial. Even giving him the name of Jacob's brother might be inappropriate to the audience as well. The devil claims to have many names, and I think the writers are trying to portray a similar theme with the Man In Black.
I really liked the end of this episode and how they incorporated footage from Season 1 into it. Jacob laying MIB's body next to his Mothers and crossing their arms as Jack finds them was beautiful. Jacob putting the white and black stones in the sack as Jack does the same was very nice too. I had forgotten that Locke was the one who finds them and states "Our very own Adam and Eve".


Which brings me to.....
Theories/Speculations/Questions:Guess I'm not done with this section, after all. Jeez.
Jacob's mother tells the boys that this cave with light in it is what she is there to guard. She says that there is some inside of every man, but he always wants more. She says that if anyone tries to get more, it, and all of it in the world will be gone. It is the one thing that is forbidden. One thing that must be protected and not be used for oneself. It is representative, in fact, of the Forbidden Fruit in the Garden of Eden, or Pandora's Box. It is the one thing, that when touched or meddled with, releases intense evil into all of the land.
It's not really meant to be your Bible story parallel, though. That is why this episode was so gosh-darned vague. This island is supposed to be the birthplace of evil. Ground zero for the battle of right and wrong, good and evil, all that jazz. Jacob and MIB were classic Cane and Abel. His jealousy over his brother, channeling other ancient cultural stories, made him make a bad choice. It made him turn that light into darkness. It made that darkness turn into pure, unadulterated smokey badness. But here's the thing. Although the evil is there, the good still exists. The light is still at the end of the tunnel; it is only hidden. One has to dig and find it.
Here are my questions:
Is the light kinetic or potential energy if it can help MIB off the island? Is it goodness? Is it a supreme being? Is it love? It is electromagnetic time-travel plutonium that could fuel my Delorian?
If every man wants more of it, could it be Knowledge, and therefore alluding even more to the Forbidden Fruit? Could Jacob and the world just not see the monster until he hurt his brother, just like Adam and Eve did't know they were naked until they ate the fruit?
Is the Smoke pure evil? If it is related to the light, is it pure power? Animalistic power or rage or something?
How is MIB seeing his dead mother if the smoke monster hasn't even been released yet? Is he mentally ill? Is he special as his mother told him? Is that how he "just knows" things like the rules of the game his mother planted for him? Does he have psychopathy?
If their mother made it so they could never hurt each other, how did Jacob knock MIB out? Is it just that he can't kill him?

Why can't MIB leave the island, but Jacob has made several trips? Why did they make it a point, just to fuck with us to see if we caught on that he was really dead? I mean, he is dead. And so is Sayid. Deal with it.
So, let me get this straight: there is still good in the world and on the island. There is also bad. The smoke monster takes on the visage of dead bodies. He also takes on their memories and knowledge. His first visage was of MIB. So he really has no name, even if MIB had a name in the beginning. Unless he meets Desmond, and then his name actually will become "Brotha".
I think this is all that we'll get as far as smokey. I hope I am wrong. Only two more episodes left. Can't wait to make my Dharma cookies for the Finale.
Namaste.