Next time somebody says to you, “I’m right, and you’re wrong,” say, “Pfftt, you’re right. You are right. You’re right.” And mean it.
In other words, don’t mock them. Don’t be sarcastic. “You’re right.” 
And then watch how, all of a sudden, their legs almost go right out from under them. They don’t have the energy to blast you, because you just took the fuel away from the fire.
Abraham Hicks, Excerpted from Boston, MA on 5/17/03