"Actually '78 was a really exciting time for U2. We had just discovered F sharp minor. So we had the fourth chord and we'd only had three up to then."
The Picture of Dorian Grey mentioned in the song 'The Ocean' is a novel by Oscar Wilde, the Irish author who has been a huge influence on Bono's lyrics. In referring to it, Bono mocks his own vanity in thinking a rock star can change the world.