This assertion can be explained by pointing to the fact that...
This assertion can be explained by pointing to the fact that what forces man to use speech, create words and make use of expressions is nothing other than his social and material needs. In his social life man is forced to try to make his fellow-men understand his thoughts and intentions and the feelings which exist within his soul. To accomplish this end he makes use of sounds and hearing. Occasionally also he uses to a degree his eyes and gestures.
That is why between the mute and the blind there can never be any mutual comprehension, for whatever the blind man says the deaf cannot hear, and whatever the mute makes understood through gestures the blind man cannot see. The creation of words and the naming of objects have been accomplished with a material end in view. Expressions have been created for those objects, states, and conditions which are material and available to the senses or near to the sensible world.
As can be seen in those cases where the person addressed lacks one of the physical senses, if we wish to speak of matters which can be comprehended through the missing sense we employ a kind of allegory and similitude. For example, if we wish to describe light or color to one who is born blind, or the pleasures of sex to a child that has not reached the age of adolescence, we seek to achieve our purpose through comparison and allegory and through providing examples.
Therefore, if we accept the hypothesis that in the scale of Universal Existence there are immense levels of reality which are independent of the world of matter (and this is in reality the case), and that in each generation there are among mankind but a handful who have the capability of comprehending and having a vision of these realities, then questions pertaining to these higher worlds cannot be understood through common verbal expressions and modes of thought.
They cannot be referred to except by allusion and through symbolism. Since religious realities are of this kind, the expression of the Quran in such matters must of necessity be symbolic. God says in his book, "Lo! We have appointed it a Lecture in Arabic that haply ye may understand. And Lo!
in the Source of Decrees, which We possess, it is indeed sublime, decisive." (Common comprehension cannot understand it or penetrate into it.) (Quran, XLIII, 3-4) He also says, "That (this) is indeed a noble Quran, In a book kept hidden, Which none toucheth save the purified" (Quran, LVI, 77-79).