Leonard Cohen quoted in Telegraph 41, p. 30

"[Bob] said, 'I like this song you wrote called Hallelujah.' In fact, he started doing it in concert. He said, 'How long did that take you to write?' And I said, 'Oh, the best part of two years.' He said, 'Two years?' Kinda shocked.

And then we started talking about a song of his called I And I from Infidels. I said, 'How long did you take to write that.' He said, 'Oh, 15 minutes.' I almost fell off my chair. Bob just laughed."