Why does the whole of the mankind await the reappearance of the Savior?
Imam Mahdi (a.s.) is the key to justice and the symbol of divine justice on earth. As a result, all the humanity look forward to his Excellency’s reappearance, in one way or another. Well, Muslims have precisely identified this great awaiting, and the Shia have clear and detailed information about the redeemer.
So the matter of awaiting Imam Mahdi, from this perspective, is not only specific to Shia, and not even only to Islam. Rather, it represents awaiting among people from all walks of life and all nations of the world. It represents hope in the hearts of humanity: history of humankind moves toward improvement. This hope gives power to bodies, light to the hearts, and determines that every move towards seeking justice is aligned with the natural direction and order of the world and human history. Consequently, before the revolution when our nation was fighting, they felt like they were advancing toward the ideal of humanity. Similarly, after the revolution, the Iranian nation feel like every move and action they take, every fight and hardship they endure, is directed towards a goal which is shared by all the humans and all the believers. The purpose is to establish justice and the goal is to achieve justice for all the humans. Islam will provide this justice.