The Jesuit theologian Gerald O'Collins has authored or co-authored over seventy books. He taught for more than thirty years at that flagship of theology, the Gregorian University in Rome. His students have become professors in universities, colleges and seminaries around the world.
Obviously, I'm dogged by the same questions as everyone else: why pray? Does it work? How do you know? Is anyone listening? How can it work anyway if millions of folk are all praying at the same time about different things?