Professor Ansarian: Imam Hussein peace be upon him, as a manifestation of the perfect man with his speech and behavior, invited people to monotheism. When Imam Hussein would say: “O Allah Almighty” many people understand the oneness of the lord of the universe; because his speeches are originated from his divine heart and the speeches that are derived from the divine heart can influence the hearts of awakened people and can become monotheists on the spur of the moment.
source : erfan.ir
