In this flash sideways to 2004, Jack seems quite calm as he searches for his father's will. He even turns down a drink.
Something has happened to Claire. Infected by a darkness, she demands to know where Aaron is in this scene.

Lost Season 6 Episode 4 Quotes

I was broken and thought the island could fix me.


Jack is here because he has to do something. He can't be told what that is. He's got to find it himself. Sometimes, you can just hop in the back of someone's cab and tell them what they're supposed to do. Other times, you have to let him look out at the ocean for a while.