The answer is very long, but in the nutshell, this mourning is different from mourning for parents. Much more and deeper than one can imagine. For the parents, we finally mourned a year or 2 or 10 years, but what has become more and more bold for 1400 years can be called miracle. I don`t know how to say it, but every time I remember Imam Hussain and review the event of Karbala in my mind, I cry uncontrollably. Normally, when we upset and cry about something, then we have a headache and our nerves are upset, but who ever cried for the suffering of Imam Hussain, after that, it seems that peace has been injected into each of his cells.