Unity and knowledge
" Do not let many manyness veil you from the Tawhid of Allah! I have explained to you the object of your Tawhid without addressing myself to the essence in itself, since reflection upon it is for bidden according to the law. The messenger of God said, "reflect not upon God's essence," and God says, "God warns you about His self", that is, you must not reflect upon It and judge by some matter that It is such and such."
"But God did not forbid talking about the Divinity, although it is not grasped by reflection, and the folk of Allah declare witnessing it to be impossible. However, the Divinity has loci of manifestation within which It becomes manifest, and the vision of the servants becomes connected to these loci, while the religions have mentioned this sort of thing."
"We have nothing of knowledge other than attributes of declaring incomparability and attributes of acts. He who supposes that he possesses knowledge of a positive attribute of Self has supposedly wrongly, for such as attributes would limit Him, while His Essence has no limits. This is a door which is locked toward engendered existence and cannot be opened. The Real alone has knowledge of it."
...
"The most knowledgeable of the knowers is he who knows that he knows what he knows and that he does not know what he does not know. "
...
"There is no blessing greater than the blessing of knowledge, even though God's blessings cannot be counted in respect of the causes which bring them about."
...
"The regret of ignorance is the greatest of regrets: God is unveiled for him in the place where he had not been praising Him and no joy accrues to him. On the contrary, he is exactly like someone who knows that he is about to be overcome by an affliction. He suffers terrible pain from this knowledge, for not every knowledge brings about joy."
Excerpts are from Ibn Arabi, Futuhat al Makkiyya, IV, 313.22, as translated by William Chittick in The Sufi Path of Knowledge, State University of New York Press, 1989, pages 155 – 156.
Readers are urged to buy the book and read the entire chapter on knowledge and the knower, since the arguments are sublime and can't possibly be reproduced or understood in their entirety through excerpts.