Slaves and ordinary people could not mix with the noblemen as well.

Slaves and ordinary people could not mix with the noblemen as well. But Muhammad, the Prophet of Islam (S), offered people a perfect and applicable religion that responded to the subjects of theological matters, social justice, economic affairs, equality and the rights of women in general and in detail. It was rumored that there was a drought in Mecca and that Muhammad (S) went to his uncles Abbas and Hamzah with a proposal. He said to them, “Look, your brother Abu-Talib has a big family.

Let us go to him and ask him to permit us adopting some of his children.” Finally Ja’far and Talib were adopted by Hamzah and Abbas whereas ‘Ali (as) was brought up under the care of Muhammad when he was at the age of six. In this manner the foundation of the moral and spiritual education of this intelligent child was based near the Prophet of Islam, the greatest educator of mankind.

His mental faculties was to that extent that he believed in the Prophet at the age of 8, therefore he, on the contrary of the other companions of the Prophet, had never worshipped idols and never shared in unreasonable demands, oppressive treatments and unfair acts of chieftains. A new religion with its rule of equity and brotherly love came severely in contact with the previous customs. The unbelievers closed all the doors of livelihood in front the believers.

They left no deficiency in creating difficulties for them; therefore the Prophet had to invite people to theism in concealment. The secret invitation took three years of time and then a verse came down from the Heaven: “And warn your nearest relations and be kind to him who follows you of the believers ” (26:214-215) The Prophet's relations (Quraysh family) were the most obstinate opponents of him. They were also of property and influence.

They were called to gather together in the house of the Prophet's uncle, Abu-Talib. The Prophet decided to unveil what was concealed. After a primal speech about God and His attributes and after reproaching the idols and idolatry, he said: “The first one among you, who believes in the unique God and adopts me as His Messenger, will be my successor.” No one of those, who were present, gave his adhesion except ‘Ali ibn Abu-Talib (S).

As some of the great Sunni scholars mentioned that the proposal was repeated three times and there was only ‘Ali, who answered affirmatively and said: “O the Prophet of Allah, I believe in Allah and His messenger and I will be your assistant towards difficulties”.