The answer to the question

David Zimmer on translation:

Much of the work was mechanical, and because I was the servant of the text and not its creator, it demanded a different kind of energy from the one I had put into writing The Silent World. Translation is a bit like shoveling coal. You scoop it up and toss it into the furnace. Each lump is a word, and each shovelful is another sentence, and if your back is strong enough and you have the stamina to keep at it for eight or ten hours at a stretch, you can keep the fire hot. With close to a million words in front of me, I was prepared to work as long and as hard as necessary, even if it meant burning down the house.

~ from Paul Auster's The Book of Illusions