Consider an example. A brother made a return visit on an elderly gentleman who had read our magazines for a number of years.
أَلَيْسَتْ كَلِمَةُ ٱللهِ فَعَّالَةً جِدًّا فِي ٱلْخِدْمَةِ ؟‏ —‏ اع ١٩ :‏ ٢٠‏ .‏