OK, it's a song lyric.  "We exist on one planet" just wouldn't have the same artistic flair.  Neither would "but we all perceive that one world differently".  
Define "god of ignorance".
Define "our true nature".
A person's brain creates their thoughts, but it is influenced by a number of factors before that happens, e.g., world experience, genetic make-up, sex, education/indoctrination, type of parenting received, health, socio-economic background, native culture, etc., etc., etc.  What two of us perceive this world exactly the same way?

You say a person's brains creates their thoughts as if the brain created itself, as if matter can create matter.   What caused the visible brain to appear from the invisible brain is the deeper question.  And it is my discovery that there is no question a man can ask that doesn't already have an answer.

"God of ignorance" as it relates to the subject matter of this thread is that we believe we have a life, or have thoughts, rather than that we are the life of our thoughts and are the thoughts of our life.   It is this belief in having something that are all the gods of things that is the veil that block our vision from seeing that we are the God of ourselves, which is the same thing as saying we are the God of our thoughts.

"Our true nature" is just as I said above.  There is no separation between you and what is eternal and infinite, Your thoughts of You.