I read this one as about anti-depressents ("A perfectly good poison / for the perfectly numb"..."If flowers should bloom upon your wallpaper face", etc.), and the conflicting senses of knowing that your missing out on something ("Are you missing a stranger / that you might have loved"), but at the same time a fear of what it may mean to lose your letter-boxed view of the world and directly face emotional issues.
I read this one as about anti-depressents ("A perfectly good poison / for the perfectly numb"..."If flowers should bloom upon your wallpaper face", etc.), and the conflicting senses of knowing that your missing out on something ("Are you missing a stranger / that you might have loved"), but at the same time a fear of what it may mean to lose your letter-boxed view of the world and directly face emotional issues.