The interconnectedness and interdependence of everything, the Oneness of the Universe, do not require belief or faith. It just is. The word God is a symbol for the unknowable, the incomprehensible of eternity/infinity. Every human being regardless of faith, religion, creed of cultural background, is part of the whole. But some like to argue about semantics, about personal views and perspectives about the infinite unknowable, just like some try to imagine a personal relationship with this unknowable quality they call god/atman/christ/great spirit. It is all about the ego wanting to be more than some insignificant speck of dust in an infinite sea of specks of dust. Some people are content knowing that they are insignificant some are not. In the grand scheme of things, it really doesn't matter if you believe or have faith in the infinite because we are all just part of the greater whole.