Work by everything that is possible, for it is a combat with Iblis, who wants to take the greatest number to Hell Fire… The people will see the world as an hour after death, as if they hardly know anything from it. He [Iblis] wishes to implement his promise of tempting the creation, for if he can not delay the appointed/promised day; he wants to implement his promise by tempting everyone except for the chosen ones [1].
His failure finally to delay the last confrontation, and the establishment of the divine promise by the victory of the three hundred and thirteen over their selves, [that] does not make him turn away from the target which he has always promised [to implement] which is tempting people. So your victory is by guiding people, guiding them and not only establishing the Proof (Hujja) upon them. Do everything that is possible for you to do in order to guide them, I am only advising you that you strive/fight against Iblis with everything that you possibly can, disgrace him and disgrace his soldiers from among mankind and jinn.
From the book With The Righteous Servant – Part 1 (Ahmed Alhasan (a.s))
[1] In order to give victory to The Qa’im (pbuh) who shall move forward towards Iblis and strike his neck in the Mosque of Al-Kufa, and they are few, as was mentioned about them by the Family of Muhammad in many traditions, and that they are like salt in food and Kuhl in the eye, and more rare and more rare. And also [they were mentioned] in the previous books, for in The Holy Book: (14: Because the group of people are called, but only few are those whom are chosen) Congregation of Eastern Churches: page 97.
First Mahdi : Yamani : Ahmed Alhasan 