I'm not Douglas Adams, but as far as I can remember, the reason for stealing the heart of gold was to enable Zaphod and that Zarniwoop character to get to the guy who rules the Universe. Which they did, although Zaphod apparently lost interest in the whole idea somewhere along the way... and the reason for the memory block I've either forgotten or never really figured out anyway.
I'm not Douglas Adams, but as far as I can remember, the reason for stealing the heart of gold was to enable Zaphod and that Zarniwoop character to get to the guy who rules the Universe. Which they did, although Zaphod apparently lost interest in the whole idea somewhere along the way... and the reason for the memory block I've either forgotten or never really figured out anyway.