Oh, God, my God. This is the style of ʿAlī, the Imam ʿAlī... if there was one person in the whole world to write good Persian, it’s Shoghi Effendi.

Dhikrullah Khadem, Hand of the Cause of God says:

We had a [?]. The nonBaháʼís custodian of the mosque of Sepahsālār, which is the greatest mosque in Tehran, the mosque and school. The Shah of Persia is custodian. He was acting for the Shah. I don't mention his name just in order to avoid anything for the family or if he's alive. He attended the presence of the Guardian, and coming back to Persia to Tehran, he sent a message to the National Assembly that he wanted to meet some of the Baháʼís just to express his gratitude to the beloved Shoghi Effendi that he had bounty to be in his presence. So he was invited, that great Mullah, well known. And when he came and the National Assembly arranged for a meeting, he discussed, he told us about the beloved Shoghi Effendi and he said, “I don't know where did he go learn Persian. He’d never been in Persia.” And he spoke about the gardens of the Holy Shrine of the Báb. He said if you employ 100 gardens, gardeners, they cannot make such a beautiful job that the beloved Shoghi Effendi has done only with two gardeners. This was amazing. And after this, he said, “I haven't heard any of the writings of the beloved Guardian. Have you any?” We had that Centenary Tablet. And when it was recited, it was chanted, he became so humble, this great Mullah, the greatest. And then he said, “Oh, God, my God. This is the style of ʿAlī, the Imam ʿAlī. I can’t see any difference.” And the words that he said, I put it down and it was mentioned to the Guardian, reported to him. He said, “The owner, the one who wrote these passages has [?], has innate knowledge from God.” That was his expression about the Guardian.

Another one, the writer, newspaper man, in a meeting in the court of the Shah, the members were there, and some of the writers, some of the ministers in the Cabinet. The man came and they asked him to speak about his trip. He said the thing that I can share with you is that I've been in the presence of the Guardian, Shoghi Effendi. And then he said, “Just imagine Saadi.” Like Shakespeare to the British and English people. He said, “I just could see and you can see that Saadi was sitting there and speaking with that fellow [?].” That was his expression about the beloved Shoghi Effendi. And the Dean of the University of Literature in Persian literature, again I don't mention his name, he announced in the university that if there was one person in the whole world to write good Persian, it’s Shoghi Effendi. Through his messages and through that knowledge that this Mullah said, the innate knowledge of the Guardian, we have all these writings of the Guardian, and the guidance until next manifestation of Bahá’u’lláh.

https://bahai.works/Transcript:Dhikrullah_Khadem/Address_from_the_Hand_of_the_Cause