This is the call of Allah so who will respond to it?

This is the call of Allah so who will respond to it?

O you who have believed, respond to Allah and to the Messenger when he calls you to that which gives you life. And know that Allah intervenes between a man and his heart and that to Him you will be gathered.

Quran (8:24)

Is there any source of life better than the Quran for the individuals and the nation?

Allah has made "the Spirit" a name of the Quran! He said(what means): 

(We revealed to you, (O Prophet), a spirit by Our command.)

Quran (42:52)

He said (what means): He sends down the angels, with the inspiration of His command, upon whom He wills of His servants, [telling them], 

"Warn that there is no deity except Me; so fear Me."

Quran(16:2)

and said (what means) : "[He is] the Exalted above [all] degrees, Owner of the Throne; He places the inspiration of His command upon whom He wills of His servants to warn of the Day of Meeting."

The majority of the scholars held the opinion that the meaning of the word "spirit or inspiration" in these verses is but the revelation and the Quran! This is enough evidence of its amazing revival secret!