Believing is not substantiated by evidence; whereas, knowing IS. It doesn't take any intelligence, wisdom, seeking, or even rationale for believing. Believers can believe anything - Anandmurti Gurumaa.
Spirituality and religion are not synonymous. Religion has more to do with rites and rituals. Spirituality is about rational knowing; religion is about blind following. A master experientially uncovers the ultimate truth and starts disseminating the knowledge to people so that they can start their own investigation. But when the experiential truth gets left behind and people start blindly following just the rituals – religion is born.
There is no separation between God and us. It is just that we are still in a deep, dark sleep of ignorance. So, all that needs to be done is: just wake up!.