Flame Turns Blue lyrics

I went looking for someone I left behind Yeah but no-one just a stranger did I find
I never noticed hadn't seen it as it grew
The void between us where the flame turns blue

Different places yeah but they all look the same
Dreams of faces in the streets devoured by names
I'm in collision with every stone I ever threw And blind ambition where the flame turns blue

Words dismantled hey and all the books unbound
Conversations though we utter not a sound
I heard a rumour I don't know if it's true
That you'd meet me where the flame turns blue

So I venture underneath the leaden sky
See the freight train with its one fierce eye And then I listen as it tears the night into With a whistle and the flame turns blue

In the morning I will sing
In the morning I will sing

Through the lemon trees the diamonds of light
Break in splinters on the pages where I write That if I lost you I don't know what I'd do Burn forever where the flame turns blue Yeah if lost you I don't know what I'd do Burn forever where the flame turns blue

In the morning I will sing
In the morning I will sing
In the morning I will sing
In the morning I will sing

Submitted by Guest

What do you think is the meaning of Flame Turns Blue by David Gray?