I understand that line is part of Shaw's character development, the problem to me is the religion theme feels out of place in Prometheus and I'm gonna explain why, in my opinion. I do understand Weyland is dying and when someone shows up and tells stuff about discovering the origin of humanity / who made humans, he's like "bitch let's roll, I'm gonna sponsor your joint !" because he sees a way to deceive Death. But to me, the religion theme comes from Lindelof and the line feels very poorly placed, it's like "no explanations needed, Jesus is on board guys".
I would have liked real explanations, because then why would we get a map to visit the Engineers secret biochem weapons bunker ? See where I'm going ? There is no concrete explanation about the "map", we don't know how and why some civilizations had it and just when questions are raised : "because that's what I choose to believe". The line feels like a giant placeholder for future explanations, exactly like Lindelof did with LOST finale "it's magic and I ain't gonna explain shit". To me it's poor writing, if you wanna talk about religion, then don't use it as a excuse to your mediocrity.