Translation of the letter:
The righteous servant of God, Mansoor Hashemi Khorasani, wrote to the Persian Muslims in the beginning of his letter after praising God and sending salutations to His prophet:
“And as to what follows... Oh wise people! Oh Muslim brothers and sisters! I have a word with you about you. Will you listen to my speech and believe it or will you close your ears and continue your way?! I swear to God, if the enemy of an individual writes to him a letter, he would read it carefully to know what his enemy has written for him, while I am your compassionate friend and well-wishing brother, and it is more deserving to know what I have written for you. If you do not know me, I do know you and if you do not like me, I do like you. Listen to my speech and do not ask who I am; for the identity of an individual will be revealed by his speech and an intellectual will look at the speech and not at the speaker!
How many words of truth does a child speak, and how many words of falsehood do elders say! A word of truth is true, even if a child says it, and a word of falsehood is false, even though elders may say it! Hence if you recognize a speech, not recognizing its speaker will not harm you, just as if you do not recognize a speech, recognizing its speaker will not benefit you! So listen to my speech to recognize me; because an individual is hidden under his tongue, and one is not recognized until he speaks his mind.
You have not been given ears except to listen, and you have not been given eyes except to see, and you have not been given the intellect except to distinguish that which you hear and see that which one is right and which one is wrong. So listen to my speech by your ears and assess it by your intellect so that if it is right, accept it and if it is wrong, reject it. May God bestow upon you success; because satan wants you to not hear so that you will not know, and to not know so that you will be in misery, and is not misery except the product of ignorance?!
I know those who have been before me, have spoken a lot and have irritated you; because much of their speeches were lies, and they have said things about which they have had no knowledge, and a group of them want you just for themselves, and do not speak except to deceive. They call you to a truth which they themselves have no relation to, and want for you a good which they themselves are not being benefited by! For these individuals have taken religion as a resort for gaining power and have made the Hereafter a pretext for this world; otherwise, they neither know the religion as they should, nor do they want the Hereafter as it deserves.
Now I speak to you, while I neither have hope for power nor have any greed for this world. I am one amongst you who is considered to be weak on this earth like you, and I am not going after superiority over you or creating any corruption on earth. I do not want anything other than to promote Good and prohibit from evil, so that God makes anyone He wills listen and anyone He wills deaf, and how do you know?! Perhaps He will alter some things and reveal some things; because He is Capable of doing anything and is Knowledgeable about all matters”.