CRAZY CANDIDATE ANAGRAM

Jacob has referenced several times that another man would be coming to the island soon. At the lighthouse, he told this to Hurley, who was concerned that since Jack broke the mirrors, the person could not find the Island. It may have been just a ruse to get Jack to ponder his status of being a Candidate.

Inside the Lighthouse, there were three unknown Candidates whose names had not been scratched off:

56 Haasra
57 Grimwault
60 Kysea

So it is probable that one of these names is Jacob's wild card Candidate who has yet to appear on the Island.

When we left Jack, he was staring out to see, in a silhouette pose similar to a hieroglyph of a ruler, pondering the revelation that some one had been spying on him since his childhood. This is a creepy violation of personal privacy. It also puts into doubt any of his personal reasons why he returned to the Island.

As TPTB like anagrams, the unknown Candidates names create the following crazy phrase, which does put a take on what Jack may be thinking as he stares out into space:

A SARAH WARM GUILT AS KEY

Against his father's advice, he miraculous saved a person named Sarah, whom he married (in the flashback time period). But his marriage quickly fell a part from his own paranoia, leaving him on the edge of jumping off a bridge post-island. Is Jack's heart felt guilt about his failed relationship with Sarah the key for him becoming Jacob's surrogate?