Translation of the letter:
The righteous servant of God, Mansoor Hashemi Khorasani, in the beginning of his letter to Muslims, wrote after praising God and sending peace to His Prophet:
“And thereafter... O wise people! O Muslim brothers and sisters! I have a word with you about you. Will you listen to it and set your heart on it? Or will you close your ears and follow your own paths? I swear to God, if one’s enemy writes him a letter, one will read it carefully to know what the enemy has written him, while I am your compassionate friend and well-wishing brother, and it is more deserving to know what I have written you. If you do not know me, I do know you and if you do not like me, I do like you. Listen to what I say and do not ask who I am; for a person is known by his words, and the wise look at what is said and not at who has said it!
How many true sayings a child says, and how many false sayings elders say! A true saying is true, even if a child says it, and a false saying is false, even if elders say it! So if you know a saying, it does not harm you if you do not know the one who said it; as if you do not know a saying, it does not benefit you if you know the one who said it! So listen to what I say to know me; because a human being is hidden under his tongue, and people are not known until they speak their mind.
You have not been given ears unless to listen, and you have not been given eyes unless to see, and you have not been given the intellect unless to distinguish between what you hear and see to know what is right and what is wrong. So listen to what I say by your ears and examine it by your intellect to accept it, if it is right and deny it, if it is wrong. May God grant you success; because satan wants you to not listen so that you will not know, and to not know so that you will be in misery, and is misery the result of anything but ignorance?!
I know those who were before me spoke a lot and irritated you; because many of their words were lies, and they said things about which they had no knowledge, and a group of them want you just for themselves, and do not speak unless for deception. They call you to a truth which they themselves have no relation to, and want for you a good which they themselves do not benefit from! These people have made the religion a support for gaining power and the Hereafter a pretext for this world; otherwise, they do not know the religion as they should, nor do they want the Hereafter as it deserves.
Now I speak to you, while I have neither hope of power nor greed for this world. I am a man from among you, who is considered weak on the earth like you, and I do not seek to be superior over you or to cause corruption on the earth. I do not want anything but to enjoin the good and forbid the evil, so that God makes anyone He wills listen and anyone He wills deaf, and what do you know?! Perhaps He changes some things and reveals some things; because He has power over all things and full knowledge of everything”.