Now apply that to all religions and combine it with a non-belief in the supernatural. That in and of itself is not a religion in the dictionary sense. Much like not playing sports is not a sport itself.
Let’s go bigger than mere dictionary definition.
I am convinced that the area of the mind/brain which deals with spiritual belief—whether it’s the pineal gland or some other “God spot” either within or without spatiotemporal reality—is always activated in any given human being.
I believe yours is activated by your deepest beliefs about you, your life, your loved ones, the universe and reality itself.