How Quran is preserved?

We have, without doubt,sent down the Message; and We will assuredly guard it (from corruption){Al-Hijr:9}

The word of thy Loard doth find its fulfilment in truth and in justice: None can change His words: for He is the one who heareth and knoweth all. {Al-Anaam:115}

And recite (and teach) what has been revealed to thee of the Book of thy Loard: none can change His Words, and none wilt thou find as a refuge other than Him. {Al-Kahf:27}

• Quran was revealed in Arabic language to Arab nation

• The meaning of the scriptures; Torah, Psalms, Gospel, Bible and Quran

• Hadis that encourage (motivate) people to read Quran

• Quran is recited during solat and outside solat

• The verse of Quran was revealed by stages

(It is) a Qur'an which We have divided (into parts from time to time), in order that thou mightest recite it to men at intervals: We have revealed it by stages. {Al-Isra:106}

• Quran is recited more frequent during Ramadhan – solat Tarawikh

• Every Ramadhan, Jibril gave revision of Quran to Muhammad

• Eventually many people memorise Quran

• Analogy: Memorise song’s lirics due to repetition (even foreign language)

• Read in Arabic worldwide – preserve original saying