I just thought of a scenario where a sacrifice by Jolee could have meant something in the overall scheme of things.
On the Rakata unknown world when Revan is about to enter the temple, Jolee comes running up and says he has a bad feeling about this. The Rakatans say that only Revan can enter to avoid what happened last time. So then Jolee is faced with a dilemna; to appease the Rakatan, Jolee can either agree to stay within the temple for eternity once he enters, so that he can help Revan with his quest, or he can decide he's not going to sacrifice himself and thus Revan must enter the temple alone.
In other words, Jolee agreeing to the stipulation that he must live the rest of his days within the temple should he enter would be him sacrificing himself for Revan and the galaxy's destiny.