A young boy asked his grandfather why he reads the Quran every day even though he can't understand it. The grandfather told the boy to carry water in a coal basket from the river to show him why. Though the water kept leaking out, the boy continued trying until he realized the basket had been transformed on the inside and outside from carrying the water. The grandfather explained that reading the Quran is similar - a person may not understand it fully but it changes them for the better inside and out through the work of Allah.