The song references light many times, and light is constantly attributed to God in a metaphorical sense, to symbolize how His holiness drives out sin, and reveals the truth hidden in the darkness.
Primary reference:John 1: "1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made. 4 In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not comprehend it. 6 There was a man sent from God, whose name was John. 7 This man came for a witness, to bear witness of the Light, that all through him might believe. 8 He was not that Light, but was sent to bear witness of that Light. 9 That was the true Light which gives light to every man coming into the world"
And so, when Adam writes, "fill the darkest night with a brilliant light cause it's time for you to shine," he's referring to this: "Let your light so shine before men, that they may see your good works, and glorify your Father who is in heaven" [Matthew 5:16]
It's written generically enough that non-Christians don't understand the lyrics (note: "the darkness did not comprehend [the light]"), but in reality, the whole song is a Christian song encouraging believers to share their faith and to do good works for the Kingdom of God.
The references to "xyz will try to bring you down" refers to being discouraged from sharing our faith, being made to think that it's not worth it, or that we're not doing a good job. The flame that melts our hearts is a reference to a verse in Proverbs that allegorically depicts God as a "refiner and purifier of silver" [by passing through "the fire" of trials in life, our souls are purified], as well as a reference to the Lord being a "consuming fire," and other verses elsewhere referring to our hearts burning/being on fire for God.
tl;dr
In Summary, Shooting Star is like Meteor Shower--a song dedicated to God, without mentioning Him explicitly, although this one is addressed to Christians.
Part of the interpretation of this song depends on this (post from Adam Young's official Owl City blog): http://owlcityblog.com/2012/05/29/the-world-will-try-to-bring-you-down/ .
The song references light many times, and light is constantly attributed to God in a metaphorical sense, to symbolize how His holiness drives out sin, and reveals the truth hidden in the darkness.
Primary reference:John 1: "1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made. 4 In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not comprehend it. 6 There was a man sent from God, whose name was John. 7 This man came for a witness, to bear witness of the Light, that all through him might believe. 8 He was not that Light, but was sent to bear witness of that Light. 9 That was the true Light which gives light to every man coming into the world"
And so, when Adam writes, "fill the darkest night with a brilliant light cause it's time for you to shine," he's referring to this: "Let your light so shine before men, that they may see your good works, and glorify your Father who is in heaven" [Matthew 5:16]
It's written generically enough that non-Christians don't understand the lyrics (note: "the darkness did not comprehend [the light]"), but in reality, the whole song is a Christian song encouraging believers to share their faith and to do good works for the Kingdom of God.
The references to "xyz will try to bring you down" refers to being discouraged from sharing our faith, being made to think that it's not worth it, or that we're not doing a good job. The flame that melts our hearts is a reference to a verse in Proverbs that allegorically depicts God as a "refiner and purifier of silver" [by passing through "the fire" of trials in life, our souls are purified], as well as a reference to the Lord being a "consuming fire," and other verses elsewhere referring to our hearts burning/being on fire for God.
tl;dr
In Summary, Shooting Star is like Meteor Shower--a song dedicated to God, without mentioning Him explicitly, although this one is addressed to Christians.