A Rebbe after his passing: He Is Alive

"[Regarding my father-in-law, the Previous Rebbe] he is alive. [...] Just as his children are alive, so too he is alive. Not "as if he is alive", and not "alive" with explanations [pshetlach], but exactly as his children are alive -- just as these Jews are alive and able to bring about the 'conquest' of the world -- in the same way he, too, is alive even now."

Sicha of the Lubavitcher Rebbe, Yud Shvat, 5726 (Hillula of the Previous Lubavitcher Rebbe)