because God and the Prophet are infallible in their sayings and actions, and it is obvious that obeying an infallible person conflicts with obeying a non-infallible person; considering that the opposition of sayings and actions of a non-infallible person to sayings and actions of an infallible person is possible, but rather inevitable in total, and therefore, the command to follow the sayings and actions of an infallible person entails the prohibition of following the sayings and actions of a non-infallible person, and it is not possible that God commands both of them, and consequently, attributing such a command to Him, although by citing ahad and conjectural narrations, is considered fabricating lies against Him, which is a very great sin; as He has said: ﴿انْظُرْ كَيْفَ يَفْتَرُونَ عَلَى اللَّهِ الْكَذِبَ ۖ وَكَفَى بِهِ إِثْمًا مُبِينًا﴾[1]; “See how they fabricate lies against God while it is sufficient as an obvious sin.”

To be fair, absolute obedience to someone who may intentionally or unintentionally command against the command of God and the Prophet is not rational, nor can it be obligatory, and this is one of the clear and essential matters in Islam; to the extent that it is not unlikely that one who believes in it is stupid and considered a minor like children; especially considering that absolute obedience to a non-infallible person and giving him the authorities of an infallible person are usually the sources of various oppressions and great evils, such as political tyranny, and this is sufficient to avoid them; as God Almighty has said: ﴿وَالَّذِينَ كَفَرُوا بَعْضُهُمْ أَوْلِيَاءُ بَعْضٍ ۚ إِلَّا تَفْعَلُوهُ تَكُنْ فِتْنَةٌ فِي الْأَرْضِ وَفَسَادٌ كَبِيرٌ﴾[2]; “And those who disbelieved some of them are guardians of some others! If you do not do so, there will be oppression on the earth and a great evil.” It is obvious that the piety of such a person, too, unless he reaches the level of infallibility, will not guarantee that he will not abuse his unbridled and absolute power; because it has been seen and heard many times that some pious people, when they have come to power, have violated the hudud of God and committed oppression;