Iofur Raknison Quotes in The Golden Compass
"When bears act like people, perhaps they can be tricked," said Serafina Pekkala. "When bears act like bears, perhaps they can't. No bear would normally drink spirits. Iorek Byrnison drank to forget the shame of exile, and it was only that which let the Trollesund people trick him."
But his armor was his soul. He had made it and it fitted him. They were one. Iofur was not content with his armor; he wanted another soul as well. He was restless while Iorek was still.
Because Iorek was moving backward only to find clean dry footing and a firm rock to leap up from, and the useless left arm was really fresh and strong. You could not trick a bear, but, as Lyra had shown him, Iofur did not want to be a bear. He wanted to be a man; and Iorek was tricking him.