Every knee shall bow. But that does not mean that the confession that follows will be one of saving faith. A person who jumps off the Golden Gate bridge has to "confess" that gravity is an unbreakable law of nature...but the confession will not save him from death. Or when a conquering force overwhelms a country, the conquered leaders will "bow" to their captors and even "confess" the military superiority of their conquerors, but that does not mean that their hearts have been changed.
BTW, I just realized where this was posted. Universalism does not fall under the forum's statement of faith, therefore this topic is not permitted in this subforum.