But Cora is also right; love also can be a weakness. Rumple's love for Belle is his weakness (and, of course, his love and regret over his son Baelfire). And if she is exploited by Cora or threatened by Hook, Rumple likely will be pretty vulnerable, despite his power. Henry is Regina's weakness (and Emma's), and while his influence on her (like Belle's on Rumple) is a force for good, he can also be used against her. And now that Cora and Hook are on their way to Storybrooke, both Regina and Rumple have much to fear.
So, Cora's desire is be needed by her daughter. She wants to destroy everything Regina has so that she can "pick up the pieces." How different is that than Regina's desire for Henry to need her? Neither of them can command the love of the one from whom they most want it, so needing to be needed is perhaps the consolation prize to be gained by whatever means.
Adam Horowitz and Eddy Kitsis' wonderful script weaves together many of the dangling threads of the Once Upon a Time narrative. It's a real treat!
We circle back to Rumple's imprisonment to learn that he could have escaped his cell at any time. Many suspected even as far back as "Price of Gold" that Rumple walked into Cinderella's (Jessy Schram) trap with his eyes wide open (and one very wide pair of eyes, has our Rumple!), even reveling in the "trap" set by Cinderella, Snow and Charming.
Sitting in his cell and biding his time, Rumple had written Emma's name over and over, yet it had not been the ravings of a man made insane by his isolation (although from his appearance in the Pilot, his imprisonment has taken its toll), but a way to conceal a vital bit of magic in the hopes that Emma one day might find it if needed. Does that mean that Rumple had foreseen Emma getting back into Fairytale Land and needing the magic ink? I don't think so. I believe the writing of her name over and over, as Rumple explains, had been his way of making sure he remembered her name, allowing it to trigger his memory upon hearing it in the Pilot (very cool little detail, Adam and Eddy!)
We also learn, going back as well to "Price of Gold," why Rumple wanted to acquire the Fairy Godmother's wand. Another small piece of the puzzle.