Guided2

B. The Prophetic tradition: O Ali! You hold in relation to me the same position as Haroon held in relation to Moses, except that there shall be no prophet after me.

This tradition, as should be apparent to every sensible person, shows the special quality of the Commander of the Believers, Ali(a.s), which made him the right person to be the supporter, the guardian and the deputy [or successor] of the Messenger of Allah as Haroon was the supporter, guardian and deputy of Moses when he went to meet his God. There is also the position of Ali vis-a-vis the Prophet which is absolutely equal to the relation between Haroon and Moses, except for the prophethood, which was excluded in the same tradition.

Furthermore, we find in the tradition the fact that Imam Ali (a.s)was the best Companion, who only came second after the Messenger of Allah (saw).