A lot of artists who have the attention level of John Newman employ metaphysical subtext in their love song lyrics. Its not like they wake up one morning a say "Hey I am going to create a metaphor between demonic soul possession and breaking a girls heart". They are truly inspired. Who inspires them is the ultimate question. Look at his lyrics for this song more carefully under the lens of biblical interpretation. Hell rising up to heaven is his theme. The quote "As above so below" in hermetic doctrine is the doctrine of the baphomet or as King Solomon referred to as Moloch.