H.O.N.K. if you love Jesus

I went in to a room today to educate a patient about a diabetic diet. This 45 yo man's admitting diagnosis was H.O.N.K. There was one mention of dementia in the chart, but no documentation of any altered mental status, so I didn't expect what I got when I asked the patient if he followed any type of diet at home before coming in to the hospital. He told me: "Jesus don't want me to drink diet soda and fake sugar because the body is God's temple."
Amazingly, I even surprised myself with my ability to keep a straight face and respond in a serious voice with: "You're right, your body is a temple and you need to make sure you do the best job of controlling your blood sugars so you don't damage that gift from God." Clearly the man was nuts, but I attempted to reason with his dementia... (maybe that's a sign of my semi-dementia from doing this for 12 weeks already)... Then we proceeded to talk about carbohydrate counting and I steered clear of the topic of artificial sweeteners for the next 10 minutes. My initial comment seemed to work, though. Either that or it just confused the man long enough so that he at least listened to what I was saying. However, I am not easily fooled... I expect this patient to return in a week, just like the rest of them.