Imamat (leadership) in fact...
Imamat (leadership) in fact, is far sublime in values, greatest in position, highest in status, the most exclusive issue in all aspects, the most profound and deep for the intellect of the people to reach and grasp it in their opinions, or to appoint an Imam through their selection. T Imamat (leadership) is that particular distinction which Allah, the Most Holy, the Most High, has distinguished Ibrahim, the very close friend (al-Khalil), after Prophethood.
This close friendship is the third stage (in the progression of spiritual degrees). It is a virtue with which, He honored him and established his fame. He then said, "Behold! I have made you an Imam for the people".
Abraham, the close friend, then out of delight pleaded "Please let it be in my offspring also." Allah, the Most Holy, the Most High, said, "My covenant does not go to the unjust ones." (2:124) Thus, this verse has declared the leadership (Imamat) of all the unjust ones as unlawful till the Day of Judgment and it has established it for those clean and free of evil and injustice.
Allah, the Most Holy, the Most High, bestowed him more honors in establishing Imamat (leadership) in purified and clean persons of his offspring. "We granted him Isaac and Jacob as a gift and helped both of them to become righteous people (21:72). We appointed them as leaders to guide the people through Our command and sent them revelation to strive for good deeds, worship their Lord, and pay religious tax.
Both of them were Our worshipping servants." (21:73) "So the Imamat (leadership) remained in his offspring inheriting it from each other, generation after generation, until Allah, the Most Holy, the Most High, made (s.a.) to inherit it. And He, Allah, the Most Holy, the Most High, said, "The nearest people to Abraham, among mankind, are those who followed him, and this Prophet (Muhammad) and the true believers.
God is the Guardian of the true believers." (3:68) So the Imamat belonged to him particularly, and he (s.a.), then, entrusted Imam Ali ((a.s.) with it by the command of Allah, the Most Holy, the Most High, as He had made it obligatory. It then came to be in his (Ali's) purified and clean of sins offspring, to whom Allah has given knowledge and faith, as in the words of He Who is Most High.
"Those who have received knowledge and have faith will say, "By the decree of God, you have remained for the exact period which was mentioned in the Book of God about the Day of Resurrection.