I'm a hell-bound hardcore atheist - but in my wake I've met a whole load of really religious people who've tried to convert me, who I think are pretty lovely human-beings.
Now you could read that card as being step #1 in some evil manipulation to seduce you to their evil cult - or a genuine expression of their concern and caring about another human being - or more likely it lands somewhere inbetween.
I dunno.
I just feel a bit bad slagging somebody off, who might be genuinely praying for me.
Of course I'd be tempted to reply
"Whilst I appreciate your offer of help, Beelzebub has offered to bring round some Waitrose ready-meals, so we're good - unless you can do M&S/Ocado"