/lit/ - Literature

Just finished Blindsight. It was a very good first contact story, ending could have been better but it was nice nonetheless. I was just wondering about a few things (spoilers). First, did I understand correctly than Sarasti wanted the narrator to implicate himself in the system to be a better advocate for defense when he'll be back to earth? Was it the reason he attacked him or was it part for it and part because he was overcomed by murdering impulses? Was Sarasti lacking consciousness or was his consciousness "corrected" by his interfacing by the spaceship IA?