"All shapes and shadows move in and out" they could be the surgeons or loved ones moving around his hospital bed. People are talking about or to him; he can hear them but is dying and cannot speak.
"Darkness disintegrates" Death arrives and the song transitions to the afterlife. He see the light leading up to the heavens, his soul is departing and he is taking his last chance to see the world.
"All shapes and shadows move in and out" they could be the surgeons or loved ones moving around his hospital bed. People are talking about or to him; he can hear them but is dying and cannot speak.
"Darkness disintegrates" Death arrives and the song transitions to the afterlife. He see the light leading up to the heavens, his soul is departing and he is taking his last chance to see the world.