[Sephiroth actually has repeatedly gone out of his way to dig that knife straight into Zack's chest. To twist it around just to see the agony of his heart. Maybe it's because Zack is a reminder of the person Sephiroth wants to forget. A life that no longer has no meaning.

Or maybe it's simply because Zack is especially important to Cloud.

Either way it does not matter. Not at the moment.

He pauses when Zack steps ahead of him. His eyes drifting down towards the hand against him and then back towards the man himself.]

We've already been through this. You're not the one who can stop me. You tried once before and failed. Like with so many other things. You've lost so much, even some you haven't realized yet.

[He brings up his own hand to shove Zack's away.]

Walk away while I still feel inclined to give you the chance. We'll call it for old time's sake. Hm?