Kalvan, in the spirit of reason, I offer that the verb "have" exposes the god of ignorance of our true nature, for how can have their world of thoughts?   Is man not the cause, the intent of his thinking, making him also in union with the effects, the manifestation of his thinking?
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?




"Be polite. Be professional. But always have a plan to kill everyone you meet."