By the verse Quran, 2:124, Shias believe that <answer>Imam</answer>ah is a divine position always <answer>Imam</answer>ah is accompanied by the word guidance, of course a guidance by God's Command.A kind of guidance which brings humanity to the goal. Regarding 17:71, no age can be without an <answer>Imam</answer>. So, according to the upper verse 1.<answer>Imam</answer>ah is a position which is appointed by God and must be specified by Him 2.<answer>Imam</answer> is protected by a divine protection and no one exceles him in nobility 3. No age can be without an <answer>Imam</answer> and finally <answer>Imam</answer> knows everything which is needed for human being to get to the truth and goal.
Who knows everything that is needed to get to the truth and goal?
Imam