Board Thread:Skyrim/@comment-105.158.238.148-20140417030552/@comment-24938737-20140514013742

@Kestrellius The Blades think that the Greybeards are afraid of the Dovahkiins/Dragonborns power and won't use it for its purpose: slaying dragons. Delphine claims that all you would do is "Stare at the sky or whatever it is that they do". While the Dragonborn is the only one that can slay dragons perminately by absorbing their soul (which is what the Greybeards usually overlook), they also are the only ones that can learn shouts/Thu'um very quickly.(Which is what the Blades overlook.)