I may not have gone where I intended to go, but I think I have ended up where I needed to be. ~ Douglas Adams
@AskNick I have to believe that Neil Gaiman had this in the back of his mind, if not the front, in The Doctor's Wife:
DOCTOR: You know, since we're talking with mouths, not really an opportunity that comes along very often, I just want to say, you know, you have never been very reliable.
IDRIS: And you have?
DOCTOR: You didn't always take me where I wanted to go.
IDRIS: No, but I always took you where you needed to go.