Say: ""It is not within my power (to deal benefit and harm so) that unless God wills (and allows me to), I can neither bring benefit to, nor avert harm from, even myself. Had I knowledge of the Unseen, I would always be in profit (with no loss at all), and no adversity would ever touch me. I am only a warner (against the evil consequences of misguidance) and a bearer of glad tidings (of prosperity in return for faith and righteousness) for people who will believe and who have already believed."