:The second reason is the necessity of knowing the Imam of each era
"It is a sign of faith"
Aban ibn Taghlib says: I asked Imam Sadiq: Is a person faithful if he knows all Imams except for the Imam of his own era? The Imam said: “No.” I asked again: Is he considered as a Muslim
The Imam answered: Yes
The Source: Kamal al-Din and Tamam Al-Nimeh
:The important lesson
"Every Muslim is not considered as a faithful one"
One of the duties of the awaiting people is to wait for his reappearance and to prepare themselves for that enormous event. God in the Quran accounts worshiping as a goal of human creation.”
The Prophet says while interpreting this verse in the Quran that the best worship is expectation for Imam Mahdi’s Reappearance
Mekyal al-Makarem, volume 2
A reminder:
We should examine ourselves to see how much we are really waiting for Imam Mahdi.