Iām an agnostic, that is, nothing is known or can be known.
In any closed system, it is impossible to understand anything outside it. As for the existence of a God, something created the universe, even if it is a simulation. This can be a natural or conscious event or entity, but we cannot know, nor can we ever know, nor can we even understand a conscious entity beyond our level of consciousness.
The reason I forgo belief, religion or spiritualism is that I am comfortable not knowing. People that are uncomfortable not knowing invent or worship possible answers.
