Halo on Fire Lyrics

Lyric discussion by AhmetBAYIRLI 

Cover art for Halo on Fire lyrics by Metallica

I think the song describes the life of a lion in a circus. It has to obey, can not turn away, and it has to jump through a hoop on fire. When it tries to sleep during nights, it keeps seeing the hoop like a halo over there. At the final stage, it dies, finally reaching to the real darkness. It says hello darkness and goodbye to the world.