That’s what is called The Emergence

It is worth that the man stands against oppression; stands against the tyrant, punch them in the mouths and stop so much growing oppression.

. “It’s worth it!” Men! We have this religious duty! It is not right for us who are looking forward to Imam Mahdī (mgehr)’s emergence, that we just sit down in our homes, pray with praying beads and say, “[God! Please] hurry his Emergence.

[The Emergence] will be hastened, if you do so [look forward in this way.] You must pave the way for his [The Imam (mgehr)’s] coming; it means gathering Muslims all together, so all of you get together.  God willing, he [Imām Mahdī (mgehr)] will emerge.

 

Sahife-ye Imam, Vol. 18, P. 269