Upon examination of this interesting narration, we find that the Imam himself describes in detail how the enemies would go to great lengths to corrupt the teachings of the Ahl al-Bayt (‘a). The interesting point to note though, is that we are told that whatever we find in the books of the Imam’s companions that contains elements of ghuluw should be taken to be interpolations and not ascribed to the Imam. Now the question arises – what exactly is this ghuluw and how can we draw the line that marks the boundary between ghuluw and fadha’il, for example?