Hawzah News Agency - It is narrated that after Imam Sajjad (a.s.) returned to Medina from Karbala-- maybe ten or eleven months passed between the time this caravan left Medina and returned-- a person visited him and said: "Oh! Son of the Messenger of Allah, you see, you went and what happened?”

He was right; the caravan had left while Imam Hussain (a.s.), the bright sun of Ahlulbait, so much loved by the Messenger of Allah, was among them, leading them. The daughter of Imam Ali (a.s.) had left while she was dignified and honored. The children of Imam Ali (a.s.) --Abbas and others-- the children of Imam Hassan (a.s.), prominent and talented youth of Bani Hashem had all left with this caravan. But the caravan returned with only one man -- Imam Sajjad (a.s.), with the women gone through sufferings of captivity and loss of their loved ones. Imam Hussain (a.s.), Ali Akbar (a.s.), even the baby were now gone.

Imam Sajjad (a.s.) answered that man, stating: "Imagine what would have happened if we had not gone."
Yes! If they had not gone, their bodies might have survived, but the truth would have died. The soul would have died out. Consciences would have been shattered. Logic and reason would have been condemned throughout history, and even the name of Islam would not have remained.

Imam Khamenei