After the Prophet (p.) entered Al-Medina, Ali (a.s) directly followed him(p.) and was always by his side, obeying his commands and abstaining from sins.

Ali (a.s.) was the Hero of the battle of Bader. Historians stated that he had killed during Bader half of the Kouraishites. During the battle, he used to go back from time to time to make sure that the Prophet (p.) was still secure and found him praying and prostrating to Allah. Thus, he was living with the Prophet (p.) and defending him in all his actions.

When it seemed that the Muslims were going to lose in the battle of Ohud, Ali (a.s.) was the one who defended and guarded the Prophet (p.). Whenever a Kouraishite battalion attacked the Prophet (p.), he (P.) used to tell him: "Ali! Push away this battalion away from me."

Ali (a.s.) was the Hero in all the Prophet's (a.s.) battles. When he (a.s.) stood out to fight Amar Bin Abid Wed Elamiri, in Al-Ahzab battle, the Prophet (p.) said: The whole faith stood out to fight the whole polytheism."

When Ali (a.s) stood to fight Amar, the latter said: "I would not like to fight you because your father was my friend". Ali (a.s.) answered: "But I would like to fight you".

So, the Imam (a.s.) did not care about keeping the relationships of his father or his family; he worried only about his stand before Allah.

Ali (a.s.) started his life with the Prophet (p.) who always used to call him to engage in the battles, when in the battle of Tabook, the Prophet (p.) asked him to stay in Al-Madina. Ali (a.s.) did not protest, he only tried to explain his point of view. The Prophet (p.) asked him: "Do not you like to be to me as Aaron was to Moses, except there is no Prophet after me?"

{And give me a minister from my family * Aaron, my brother * Add to my strength through him * And make him share my task} (20:29-32). SO Ali (a.s.) approved.

Since Allah had inspired the Prophet (p.) with the science of Quran and the Islamic principles, Muslims considered that the Prophet (p.) is the one who has the knowledge all sciences. They were worried because there was no enough time to learn from his (p.) knowledge. So, he (p.) told them:

That is due to the fact that Ali (a.s.) lived with the Prophet (p.), learned all his knowledge and was the only companion who was able to answer all questions concerning all issues. He was the authority whom all the companions used to refer to, while he did not have to ask anyone about any issue.

Al-Khalil Bin Ahmad Al-Farahidi, the grammar teacher of Sibawaih, the author of poetics, and the first Arabic dictionary, was asked: "Why did you prefer Ali (a.s.) and not any other person?" During that time, Al-Khalil was loyal to Ali (a.s). He answered: "Everyone needs Ali (a.s.), while he is not in need of any one - Therefore, that is an evidence to prove that Ali is the Imam (authority) of everyone".

Ali (a.s) gained this high degree of knowledge because he learned it directly from the Prophet (p.). Even, some of the Prophet's (p.) wives said that they felt jealous of Ali (a.s.) because the Prophet (p.) used to spend with him much time every night in teaching him the science of the Holy Quran and talking to him about each verse, the place where it was revealed, its events and perspectives.

Consequently, the Imam's (a.s) knowledge is derived from the Islamic knowledge and his thought is an Islamic one. Even the ideas which he applied in his experiences were also derived from the general Islamic path. Hence, his thought was demonstrated in the movement in which he profoundly thinks, plans, argues, and goes ahead in all the fields of education, for the sake of Allah.

Moreover, the Imam (a.s.) was different from all those who achieved knowledge just to freeze it in their minds and be awarded by it. He believed that his knowledge was not sought for serving his own interests, but for the sake of Allah who owned the whole Knowledge. Since Allah wanted Ali (a.s.) to teach people this knowledge, Ali (a.s.) called on people to ask him even when he was about to meet death. He used to say:" Ask me before you lose me."

Ali (a.s.) did not leave any commandment without explaining it to people, in order not to let them be suspicious toward any issue. So, he directed them to the right path and saved them from deviation.

Ali (a.s) worked on educating people on the Islamic knowledge and that is clear through his speeches in Nahj Al-Ballagha. The Imam (a.s) took advantage of every opportunity to make people aware of all the issues surrounding them. He was the ruler who aimed at elevating the level of knowledge of his people, and not just to affect in order to make them be loyal to him.

That should be also the responsibility of the leaders in the Islamic arena who must educate their people with the proper political and religious education. Thus, Allah has obliged every scholar who knows the Islamic sciences and is aware of the people's need for these sciences, to teach them and take advantage of every occasion to elevate their level of knowledge. Hence, it is unlawful for a Muslim whether he was holding a responsibility or not, to stay home, instead of writing, delivering speeches, discussing and arguing. It is stated in the Quran that: {Those who conceal the clear (Signs) we have sent down, and the Guidance, after we have made it for the People in the Book, on them shall be Allah's curse, and that curse of those entitled to curse} (2:159)

It is also stated In the Prophet's (p.) Hadith that: "If heresy appears among my people, let the scholar teach them from his science. The one who does not do so, on him shall be Allah's curse".

Therefore, Islam does not want people to be ignorant, simple minded creatures, or idiots.

If Muslim people are not aware of the religious, political, social, and economic issues, enemies can easily exploit their ignorance and entangle them in many problems.

For that reason, Islam gives a great and a special importance to knowledge. Thus, Imam Ali (a.s.) divided people in his speech addressed to Kumail Bin Ziad as follows:

He added: "Listen to me Kumail. Knowledge is better than wealth, for knowledge guards you while you have to guard wealth. Knowledge increases the actions, but wealth gradually decreases as it is spent."

Then, Imam Ali (a.s.) defined the value of man by saying: "The value of each person lies on the work he is skilled in."

It is also stated in the Quran that: {…Say: "Are those equal, those who know and those who do not know? "It is those who are endured with understanding that receive admonition} (39:9).

That is what we have to recall when talking about Imam Ali (a.s.) who was born in the Al-Kaaba (House of Allah) and devoted his life to Allah. Hence, he was born and died in Allah's hands.

So, when Bin Mouljam hit Ali (a.s.) on his head while he was praying, Ali (a.s.) said: "I swear by Allah, God of Al-Kaaba, that I won". (3). The Imam (a.s.) was still smiling because he knew that during his life, he had always followed the right path, in spite of his sufferance, pain, and problems.

Whenever the Imam (a.s.) felt that he was going to die, he directly thought about educating people. He used to say: "Ask me before you lose me".

That is Ali (a.s.) whom we are proud of because of his great Jihad, his education that is admired by every person whether Muslim or not, his justice that he proved in all his life stands, and his faithfulness to Allah and to Islam.