But yeah--Xena would see the road that she took from being EX to where she was, and think that if it was possible for her, it was possible for anyone.
I think Xena felt she didn't have the moral right to deny anyone else the right to change. I can't think of specific instances but I think there are a few times when she says of someone, "I changed, why not him/her?" (I know she says it about Draco in Comedy of Eros -- admittedly while under the love spell.) The only time she violates that rule is in the case of Najara in The Convert, and that's something that really bothers me (even if she turns out to be "right" at the end because the writers said so).
It's interesting that Callisto herself never says she can change. Except in Xena's nightmare. Hmm, that makes me wonder: was it actually Callisto who said those things, after Ares enabled her to get into Xena's dreams? Or was it all the creation of Xena's mind? I think in a way it would be more interesting if it was the latter, because that would mean that Xena's mind conjures up a Callisto who wants to change. Of course if it was Callisto then I'm sure she was simply taunting Xena and playing on her guilt.
