Someone over on tumblr posted an interpretation of Sephiroth's actions in the OG/AC which I don't really understand. I'd like to know what you guys think about it. I'll try to be succinct.
"When Meteor was summoned, [Sephiroth] had to surrender some of his memories to the Lifestream to help stop it. When he did that, he forgot a lot of his past before he knew of "what he was." Including what he looked like. And so he couldn't manifest himself as a Force Ghost to torment Cloud like you see him do in the Remake. So, he searched the Lifestream--memories of the dead and such--for remnants of himself. He found this leftover information about himself and used the Lifestream to create physical manifestations of his will. The three silver-haired boys in AC are not clones of him but ideas given form, given flesh."
I was surprised by the suggestion that Sephiroth was trying to stop Meteor, since he summoned it, and, I assumed, did so because he wanted to bathe in the flood of Lifestream that would rush to staunch the wound it made, thus transforming himself into a god. However, OP's point was that since he was already in the Lifestream when it rose to repel Meteor, he would have been destroyed, along with the Lifestream, if Meteor had succeeded, and so he needed to sacrifice part of himself to enable the Lifestream to drive back the very Meteor he had summoned while in the Lifestream.
This doesn't make sense to me, but it might to some of you who know more about this aspect of the game than I do.
"When Meteor was summoned, [Sephiroth] had to surrender some of his memories to the Lifestream to help stop it. When he did that, he forgot a lot of his past before he knew of "what he was." Including what he looked like. And so he couldn't manifest himself as a Force Ghost to torment Cloud like you see him do in the Remake. So, he searched the Lifestream--memories of the dead and such--for remnants of himself. He found this leftover information about himself and used the Lifestream to create physical manifestations of his will. The three silver-haired boys in AC are not clones of him but ideas given form, given flesh."
I was surprised by the suggestion that Sephiroth was trying to stop Meteor, since he summoned it, and, I assumed, did so because he wanted to bathe in the flood of Lifestream that would rush to staunch the wound it made, thus transforming himself into a god. However, OP's point was that since he was already in the Lifestream when it rose to repel Meteor, he would have been destroyed, along with the Lifestream, if Meteor had succeeded, and so he needed to sacrifice part of himself to enable the Lifestream to drive back the very Meteor he had summoned while in the Lifestream.
This doesn't make sense to me, but it might to some of you who know more about this aspect of the game than I do.