I think this song a guy who is fighting in the war or some sort of high risk occupation, where he has to go away and fight under dangerous circumstances. Every time he finds his way back to his loved one - her light guides him back every time. I think the candle in the window is a metaphor, for her internal strength and goodness, which keeps him alive and coming back to her. He knows realistically there's a chance that he might be killed, but he's also telling her that even if this does happen, he knows that she'll still have the same strength and he'll still always be there for her, watching over her.
I think this song a guy who is fighting in the war or some sort of high risk occupation, where he has to go away and fight under dangerous circumstances. Every time he finds his way back to his loved one - her light guides him back every time. I think the candle in the window is a metaphor, for her internal strength and goodness, which keeps him alive and coming back to her. He knows realistically there's a chance that he might be killed, but he's also telling her that even if this does happen, he knows that she'll still have the same strength and he'll still always be there for her, watching over her.