See to me, I don't understand how someone can believe. "I don't understand therefore (insert thing that conveniently explains it all here)" makes no sense to me. With that logic, god just gets smaller and less powerful with every new thing we learn for ourselves. God represents our level of ignorance. The amount of things once attributed to god that we can now explain ourselves does nothing but continually increase. The amount of things we discovered whose explanation went back to being attributed to god is and always has been exactly zero. God is our excuse. It will always be out of reach because we make it that way. As a concept it is and always has been whatever we can't explain at any given time. This speaks volumes for its validity and origin as a concept on the nature of existence.