This Is My Faith - Al-fatlawi, Ali - الصفحة ٤٩ - Demonstration of Other Types of Monotheism
the Prophet Mohammed (PBUH): (Seek knowledge from cradle to grave).
Now, the second type is obedience monotheism and it simply refers to the fact that worship is only for the Almighty Allah; obeying any one part from Allah or beside Allah might be considered polytheism (Shirk).
Hasan: How do you say that? We obey the Prophet Mohammed (PBUH), the Imams (PBUT), our parents and teachers. Is this polytheism?
Anwar: Not at all. Do not let this sort of ambiguity confuse your reason. The whole point is that our obedience to the Prophet Mohammed (PBUH), the Imams (PBUT) and our parents must not be against our obedience to the Glorious Allah; our obedience to them has to be part of our obedience to the Almighty Allah. That is what I meant by ‘might be considered polytheism’.
Hasan: So, how should we put it then?
Anwar: We have to say the absolute obedience is for the Almighty Allah, and our obedience to the Prophet Mohammed (PBUH) and the Ahl Al-Bait (PBUT) has to be