You must be wondering why I am writing about a song of a movie "Rockstar". In fact for me it is not a song but a Prayer, devotion or Ibadat to God.
'Kun Faaya Kun' describes the attribute of God through which God can create anything just by His wishing & that thing immediately becomes a reality. Literal meaning of 'Kun Faaya Kun' in Arabic is "Be, And It Is!". That means by just wishing of God everything is possible & everything becomes a reality. In Vedas also it is said that God created this world just by His wishing. God just thought of this world & it became a reality immediately. Below are few lines of this song:
"Kun faaya kun faaya kun faaya kun
faaya kun faaya kun faaya kun
Jab kahin pe kuch nahi bhi nahi tha
wahi tha wahi tha wahi tha wahi tha
who jo mujh me samaya wo jo tujh me samaya
maula wahi wahi maaya"
Meaning of above lines is that:
Be, and it is! Be, and it is!
When there was nothing nowhere,
He was the One, only One.
He is within Me, He is within You,
He is the One, only One.
That means before the creation when there was nothing in this world then He, God alone was present. God is eternal & existed before the creation also. God wished this world & this world came into existence just through His wishing. Also one God is there within me & you. God is the only one reality. Vedas also describe the God similarly.
In Bhagwat Gita also God himself is saying the same thing:
hrd-dese ’rjuna tishthati
yantrarudhani mayaya" (Bhagwat Gita: Chapter Eighteen verse 61)
"Sri Krishna said: O Arjuna, The Lord / Supreme God dwells in the heart of all beings. He is deluding all beings by His illusive power of Maya / Material energy by which they revolve according to their actions in this world."
So, O God, You live within me & I live within You. You are the only Truth. Only You are the Real one so have mercy on us.
Jai Shri Krishna