Just a couple of randomly strung together thoughts about "The Truth". Theologically speaking, in reference to Character symbolism, I believe Jack is the Island's Savior. Afterall he is the son of Christian Sheppard and oddly enough Jack Sheppard is a healer of people. He has also been the "Lostie Flock's" sheppard(bad pun intended) albeit reluctantly at first.Naomi even jested he was playing Moses and things said in jest often carry some level of truth. Ben is the caretaker of the Island and he is fighting for it's survival while searching for it's true savior. He hoped Locke would be "The One" but it appears he is not. You can see it in Ben's eyes and hear it in his carefully selected words when he is engaged with Jack. He needs Jack to leave for his "forty days and forty nights" to experience his trials and tribulations and return to island and strike down the Island's enemies delivering it salvation. Or it could be my percocets talking.
Wowza! Let the percocets talk --- I love the idea of Jack being sent away for 40 days and nights. Excellent! Welcome, Walkabout. And how great is your name?!
I'm a fan of the biblical explanations, so I love this, except that I'm not sure how much Ben is looking forward to someone coming along and taking the reins from him. I agree, though, that he surely seems to be imploring Jack to see his way, and dismissing Locke as too weak.
Also love your name, makes we want to put on the old hiking boots and head out!