Claire is listening intently, gathering the wool and collecting it in a burlap sack. It all basically tracks with what she knows, what she remembers from the few Sunday school classes she ever attended, and the pious Bible reading she was told to do.

"From a human perspective, stopping the apocalypse is the theme. A battle against heaven and hell that someone on Earth must inevitably solve. Which...seems not too far from the truth?"

That's her confirmation that she's following so far, since she hasn't looked up from her collecting.