Complex sentence: He declared that an Arab has no superiority over a non-Arab nor a non-Arab has any superiority over an Arab; also a white has no superiority over black nor a black has any superiority over white except by piety and good action.
Split into simpler sentences: He declared that an Arab has no superiority over a non-Arab, nor a non-Arab has any superiority over an Arab. Also a white has no superiority over black, nor a black has any superiority over white except by piety and good action.