Hi. I'm new here but I would like to share my theory. What if it was a Bible passage? We all know Lost is full of religion stories and importance. We can also see that in Eko's funeral, as Locke watches the stick and it was supposed to say: "Lift up your eyes and look north. John 3:05", as a passage of the bible. but instead, the second 'o' on "look" has a missed spot and looks exacly like "Lock" so the message would go directly to John Locke!