Humans can rise to the most astonishing levels of (so-called) spiritual excellence, greatness and exaltation. Above the angels, if you wish, to the extent God Almighty required of the angels to pay homage and perform Sajdah or special prostration and salutation to them on the day of their creation.
So much so, some of them, humans I mean, are sometimes taken to possess super-human powers and capabilities.
They do not.
All they are doing is rising to the higher levels of their own human potential. And in the process fulfilling what is written in the Qur'an for them as members of the human species:
Laqwad Khalaqnal Insaana Fee Ahsani Taqweem!
We indeed created the human being in the finest mould and formation.
And when I say "humans," I mean all human beings – male as well as female; Muslim as well as non-Muslim.
Except that Muslims are, by the very nature of things, a cut above.
That is why all the Muslim saints – Awuliyaa Allah – always place, and perform, above their counterpart saints of other faiths and persuasions.
Some of the categories of Muslim “saints” include the following: The Swahaabah Kiraam, Radiyallahu 'Anhum, and Tabi’een.
And all the Siddeeqween, Shuhadaa’ and Swaaliheen.
And then all the prophets and messengers of Allah, all the Rasuls and Anbiyaa’, 'alaihimus salam, rank above all the rest of the human beings, no matter how learned, saintly and exalted they may be.
And the Rasuls and Anbiyaa’, 'alaihimus salam, possess over and above their highest human potential, the special and unique gift of having been chosen as God’s emissaries to other human beings.
They all receive Wahy or what people call in English Divine Revelation from God Almighty above.
So, all the Rasuls and Anbiyaa’, 'alaihimus salam, are above all the rest of the human beings.
And above them all comes Sayyidina Rasulullah, Sallallahu Alaihi wa Sallam, greater than whom there is no one other than God Almighty himself.
As someone said:
Ba’ad az khoda buzorg tu-ee, qwissa mukhtaswar.
After God, you are the greatest, end of story.
Or as someone else said, in a different language:
Da’a madda’athun naswaaraa fee nabiyyihimi
Wahkum bimaa shi’ata madhan feehi wah-takimi.
Just leave what Christians say about their prophet. After that, heap on him whatever praise and exaltation you wish.
Meaning how Christians call Jesus, alaihis salaam, God and son of God, Ma’adhallah.
So, the poet is saying:
Avoid that one thing. Just don’t say that one thing – that Prophet Muhammad, Sallallahu Alaihi wa Sallam, is God or son of God.
After that, say in his praise whatever else you wish.
And how true!