I always find Jack's flashbacks interesting. This week we see that he was told by Achara that she perceives him to be "a leader and a great man" whose greatness causes him to be a "lonely and angry" person. She marks him with a tatto that (on the show) is translated to read, "He walks amongst us, but he's not one of us." Jack says, "That's what they say. That's not what they mean."
So what do they really mean? What is the implication about Jack that is being communicated by the seer's reading of him? Clearly, something about Jack keeps him from belonging. What are your roadblocks to belonging? Have you ever felt like a "stranger in a strange land" no matter where you go?