The meaning of the Quran differs to each persons level of consciousness
Not the Arabic language

“None touches it except the purified” – Quran 56.79

“Only a purified can understand its inner meanings”
Purification not by external ablution 
but 
Purification of your heart 

That purified can be born in any faith

Imam Jaffer Sadiq once said

The book of Allah (The Law of Nature) comprises four characteristics following the accretion of Takwa in spiritual elevation/advancement and self realization

(1) 

 The statements set down – for the ordinary  followers 

(2)

The allusions – (indirect references) – for the wise

(3)

The hidden meaning relating to the supra sensible world

Friends of Allah (vicegerants of God) 

Ex. Waliyulla, Raliallahuan saints, Saaliheen, Shuhada, muththakeen, Sowan, Rishi’s, Munivar’s, Yogi’s and spiritually enlightened souls

(4)

Exalted spiritual doctrines – for the Kuthubs and prophets

.