Bishop Aringarosa's surprised how much it hurts getting shot.
He blearily looks up and realizes Silas is carrying him, pleading for medical help. He's devastated that he shot Aringarosa.
Aringarosa is resigned to his fate. He feels like this is all his fault.
…and so he flashes back to five months ago, when he first received news that Opus Dei's success was in jeopardy:
It was the meeting alluded to earlier at Castle Gandolfo with the Vatican secretariat and two smug high-ranking Italian officials.
They'd voted unanimously to revoke the Vatican's sanction of Opus Dei. (Yeah. That'd be a big deal.)
The new Pope saw Opus Dei's policies (corporal mortification and their treatment of women) as an embarrassment.
So, the church's going to pay Opus Dei a severance package, (that's the weirdest thing we've read in this whole book) but six months from now Opus Dei would have to be their own church without support from Rome.
Only a few weeks after that meeting was when the Teacher had contacted him, somehow already knowing about his predicament.
The Teacher was asking for Aringarosa's help procuring a sacred relic that would give them both immense power over the Vatican, so of course he'd accepted his proposal.
Back to present day. Silas's finally reached a hospital, where the docs aren't too sure they can save the bishop.
Aringarosa tells Silas that instead of seeking vengeance on the person who deceived them, he needs to pray and seek forgiveness.