Bella accepts the laser, studying it with interest.

(Unlike the last person Sherlock gave one to, she does not need to be warned that shining it into her eyes would be unwise.)

What an impressively useful thing to have.

"Thank you," she says.

. . . judging from her expression a few seconds later, she also has no use for theological implications.

"It would be interesting to know why it works that way, though."