The Bishop of Ireland suggests his flock tweet the odd prayer or two. This ISN’T a ridiculous idea. -- A letter in this week’s TLS: “Sir — reviewing Sara Maitland’s A Book of Silence, Bernice Martin wonders if Maitland smokes while praying. A priest once said in my hearing that it was not all right to smoke while praying, but it was fine to pray while smoking. He was quoting, I guess, and I’d love to know who it was. FRED SEDGWICK” -- “How God Changes Your Brain” is one of those titles that could cut both ways, both Hitchens-ward and Bishop-ward.