They will not eject you from history as long as you can still speak, they will not banish you to the past, as long as you can still listen. But which present do you inhabit?
Haunt the dreams of your comrades, and the nightmares of your enemies; live in a future that never came — be a specter, a memory, and a herald. Remind them that the current state was not inevitable until it came to be. Do not occupy yourself with the question of why this very possible future failed, leave the victorious to grope for answers. Be the question, and do not heed your impotence. A ghost has no need for material presence or action, you merely need to shimmer.