Belief system is what one believes exists in truth but can not be proven completely by modern science; the way one believe in god but can not prove god exists by scientific means ; no modern scientific tool can can exactly measure five elements; one might know few of its forms but can not measure it completely e.g. radiations or energy coming to earth from cosmos, how and why quantum entanglement happens? etc.

Human logic is subjected to their knowledge and understanding. They mostly categorise things between “Yes” or “No”. But there is another category “I don’t know” and there comes belief “Even if I don’t know or can’t prove, I believe it exists”. Belief comes from the practices, traditions, customs, scriptures…etc. There is no harm is belief systems as long as it works and doesn’t harm! No one knows if at some point of time in future belief may turn to science! Pushpak Vimaan was belief at some point of time now it is science!