"Everything, it seemed, depended on gold. The magus and I had fallen easily back into our old habits. He lectured constantly, and I asked questions to my heart's delight. Where he had once been my master and I his apprentice, I had become king and he my sole advisor. Where we had once focused on natural history and philosophy, we now concentrated on administration, taxation, and the prosecution of war. He had begun his lessons by quoting the duke of Melfi: "To make war you need three things: one, money; two, money; and three, money." He went on to tell me the things I should have known already, that I would have known if I had been a more promising heir to the throne and not exclusively interested in poetry."