My Thoughts On Snape

My pet theory is that it's more than all that. It must go deeper.
I think Snape has been faking it for sixteen years.
What happened when James and Snape were back in school was real, but so trivial.
That feeling of hatred, which should have died a natural death by now,
has been carefully cultivated over time, in anticipation of this moment.
It's all part of Snape's way of fooling Voldemort.
He can't simply block his own thoughts for so long.
Voldemort is not so stupid that he would not be suspiscious of a solid stone where
a person should be. He needs to see something before he can believe.
Snape needs to play it up, to let Voldemort see what looks like real hatred, and
Voldemort needs to see that the world, and especially Harry, believes.
Harry's learning occlumency would have been good, but perhaps NOT learning it is better.
Letting Harry see any reason to believe that Snape is on the good side would give Harry
the warm fuzzies, and Voldemort would know right away. Cover blown.

As for that scene with Narcissa, I wouldn't call it a simple lie.
Snape needs to make himself believe.

Well, that's my theory.
Does it take too many twists & turns?

I think you make an excellent point right there its makes sense

I pretty much think trhe same way...and there's a part in this sixth book when Hagrid tell harry that he overheard an argument between Dumbledore and Snape, and Snape was saying something like he didnt want to do it, or something like that. I think they were talking about Dumbledore's death, and that Dumbledore was saying Snape that he HAD to kill him. So I think that Snape is in the good side.

Yes that does seem to lead us to believe that Dumbledore actually told Snape to keep his promise to Narcissa and then of course begging Snape in the end for his life. Which has brought up speculation that Dumbledore wasn't begging for his life but for Snape to kill him. I don't know. I just have to believe that Harry will have someone there for him fighting on the other side and throwing distractions along the way to throw V. off his trail until all of V. soul are found and the final battle can begin/end.