Me: We can check for thyroid problems and diabetes...
Patient: More blood taking? These things are sent to test us.
Me: Ha ha, that's very good.
Patient: Huh? What do you mean?
Me: Sent to test us. As in blood tests.
Patient: No, I meant God sends these things to test us.
Me: Yes, I get that, I just thought you were making a... I thought that was quite clever... I... Never mind.