[Ninjavenom]

You'd think so, Jamesman, but the game proves you wrong. Safer Sephiroth is the even more integrated form of jenova into Sephiroth, so they become one complete unified being. Bizarro is when he is just entering the complete phase. Notice that in the very final battle bewteen cloud and Sephiroth, that Sephiroth dies so easily? It turns out all of his power was coming from jenova, and he was truly no stronger than Cloud was. i think you should read the article Tim posted, (be warned, it's long as hell) because it explains all of the imagery and metaphor and story, in a much less confusing way.