One of these days, thought Winston with sudden deep conviction, Syme will be vaporized. He is too intelligent. He sees too clearly and speaks too plainly. The Party does not like such people. One day he will disappear. It is written in his face.
It's funny that even someone who really believes in the cause could be in danger of going too far. He's clearly passionate about the erasure of history in literature without needing more convincing from BB. I agree with Winston; he won't be around for long.
