Since my first reading, lyrics of this song are about the time you realise that your belief system is wrong. You might be into some philosophy, religion or ideology ("dark tunnels") for a period of your life, but later you come across arguments, books, scholars, scientific evidence or just your own experiences proving your past beliefs wrong or deeply flawed (the eureka moment "suddenly, the walls around him cracked wide open and an endless void appeared in flickering, grey light").
It takes a strong will and character to accept that, and it may involve feelings of shame ("the mirrors mocked him on the way"), but you come out of it stronger and better ("wiping dust off his shoulders").
Since my first reading, lyrics of this song are about the time you realise that your belief system is wrong. You might be into some philosophy, religion or ideology ("dark tunnels") for a period of your life, but later you come across arguments, books, scholars, scientific evidence or just your own experiences proving your past beliefs wrong or deeply flawed (the eureka moment "suddenly, the walls around him cracked wide open and an endless void appeared in flickering, grey light"). It takes a strong will and character to accept that, and it may involve feelings of shame ("the mirrors mocked him on the way"), but you come out of it stronger and better ("wiping dust off his shoulders").