User blog comment:MrAnonymous/What if Merlin is destined to destroy Arthur?/@comment-5674726-20121208000201

Merlin's spent a good decade of his life being guided by Kilgharrah's prophecy about his and Arthur's alleged destiny.

Unfortunately, he didn't learn his lesson about self-fulfilling prophecies in The Crystal Cave, and he is currently treating Mordred as the enemy, or at least as somebody to be very wary of, because of something that he was told he will do in the future. As a result, he is missing out on an opportunity to befriend Mordred, who seems likely to welcome his friendship, and instead, he's pushing him away.