What is the significance of the Holy Quran for a Muslim, and what is a suitable introduction to define it?

A Muslim cannot do without the Holy Qur'an, for in it is the life of his heart, the light of his insight, and the guidance for his path. From it he derives his creed, and through it he learns about his worship and what pleases his Lord. It also contains guidance and directives regarding morals and dealings.

Allah Almighty says: "Indeed, this Qur'an guides to that which is most upright and gives good tidings to the believers who do righteous deeds that they will have a great reward." (Al-Isra: 9). And whoever turns away from it will have a constricted life, as He Almighty says: "And whoever turns away from My remembrance - indeed, he will have a constricted life, and We will gather him on the Day of Resurrection blind." (Taha: 124).

The Prophet, peace and blessings be upon him, described the Qur'an as the way out of tribulations. In it is the news of those before us, the tidings of what comes after us, and the ruling on what is between us. It is the decisive word, not jest. Whoever abandons it, Allah will break him. It is Allah's strong rope, the wise remembrance, and the straight path. Desires do not deviate from it, tongues do not become confused by it, scholars are never sated with it, and its wonders never cease.