If I wanted to curse my enemy, I would send him vacuous affirming cliches, such as make it to motivational posters and FB shares. You must first love yourself before you can love others. Learn to accept yourself for the woman you are, and tune out all the negativity. Follow Your Bliss. Don't Sweat the Small Stuff - And It's All Small Stuff. He would then never know he had any spiritual danger.
(From the wonderful Despair.com)
Somewhat relatedly. Social workers and others in mental health like to post little bits of encouragement on their office wall. Except, admonishments to be kind or to listen have one meaning if they are reminders to oneself, and quite another if they are little snippy sermons directed at everyone else. I have written Don't Take It Personally across the top line of my notepad for years. It is there because that is one of my downfalls, and I need to tell myself frequently throughout the day. It might mean something much less attractive if I were saying it to others.