So fine and subtle as to be imperceptible to human sight; so pure as to be imperceptible.
“That is Allah, your Lord! There is no god but He, the Creator of all things; then worship ye Him; and He hath power to dispose of all affairs. No vision can grasp Him. But His grasp is over all vision: HE IS ABOVE ALL COMPREHENSION, yet is acquainted with all things. “How have come to you, from your Lord, proofs (to open your eyes): if any will see, it will be for (the good of) his own soul; if any will be blind, it will be to his own (harm): I am not (here) to watch over your do- ings.”
(6:102…104) The Holy Quran
From the root l-t-f with the classical Arabic connotations: to be delicate, refined, elegant, graceful to be gentle, gracious, courteous, kindly to be subtle, to know the obscurities of all affairs to treat with regard for circumstances