Lyric discussion by chaidrinker 

Cover art for Lights lyrics by Ellie Goulding

I like how you analyzed it also. Very close to what it means to me. Except the heart being gone I see as she became more guarded or protected unlike trusting days with unlocked doors. He is someone she trusted and felt very connected to for whatever reason. The lights might be when she sees him, hears him, or thinks of him it stops her in her tracks (turn to stone). Even if she pretends not to notice it has all her attention. She wonders when the lights stop if she will remember and be who she used to be and move on or go back to what she is today. But she's mesmerized. As long as the lights are there she cannot pull away or decide what to do once the lights are gone. Not only is he someone whom she still feels connected to he is someone she longs for. He is someone who takes her heart. Maybe he has had it before.

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