 Talking in the 1990s to his official biographer, Barry Miles, McCartney said that the lyrics address duality, reflecting his astrological sign of Gemini. He added: "It's such a deep theme in the universe, duality – man woman, black white, ebony ivory, high low, right wrong, up down, hello goodbye – that it was a very easy song to write." McCartney also said that, in "Hello, Goodbye", he was promoting "the more positive side of the duality".
