If a person whose father died ten years ago is asked to cry for the loss and sorrow of his father he would answer:” my father died ten years ago, I cannot cry for him now”, but if someone recites the eulogy of Imam Hussein,s martyrdom for him, he would shed tears for Imam Hussein and his tragedy. This demonstrates the very extreme passion which is in the hearts of the true believers after one thousand and four hundred years and nothing can eliminate this passion.
source : erfan.ir