Now that he's been in the illusion for a hundred hours, Dr. Manette can't believe how long it's taken him to get to this point. He's exhausted, he says, and can barely stand up straight. He doesn't even have enough medicine to keep him going for another two days. He says he'll have to nurse the child for two days before he can go back to his normal self again. He also warns him to be prepared for anything that might happen to him, because this is "an endless hell" . He tells Manette to forget all about his father and enjoy his time at school with the other kids. But Manette knows that's not going to be enough, and he warns Manette not to get carried away by his newfound power. He reminds Manette that his first impulse is always the source of his power, and if he loses that first impulse, he can never win the battle with his master again.