This is a little bit off topic but I want to get back to something Puff said earlier. How Christan was charged by Dharma to raise a great leader. I love this theory, I don't necessary believe it but I think this is a theory that can be backed up by the relationship between Jack and his father.
We see Christan constantly putting Jack down. Making Jack fight harder and harder for his fathers love and attention. Christan also is there to give Jack little peptalks when Jack is scared or nervous (when Jack gets married, when Jack loses a patient etc...). Most of all he makes Jack think for himself and what is best for everyone. Even ratting out his own father for being a drunk, this was the final stage of his training. This proved that Jack is his own man and no ties no matter family, friend, or foe will make Jack sway in what he believes is right (which is extremely important for a leader to have that ability).
Then when Sawyer sees Christian in the bar, Christian tells Sawyer how proud he was of Jack and how he could never call and tell him. Is it because he couldn't handle telling his son that or was it that he wasn't allowed too?
Great post.

Achara saw these qualities in him, as well.