"John never slept much in his life -SPARTANS were trained for efficiency, and it required to be operative as long as possible- but lately he was sleeping less than ever. He knew that was bad, but couldn't help it. He did not want to stay put, it was unbearable. Whenever he sat down for more than five minutes, John started thinking about things he did not want to think about. Mostly, about her(Cortana's) last words. Whenever he closed his eyes, he kept seeing her sad, beautiful face, when she thanked him from the bottom of her cybernetic heart for his service and friendship. And then, despair. "