The value of a fact lies in its predictive ability. If a "fact" cannot be used to make predictions, such as who will take the stage when the U.S. President is called up to speak or what will happen when you drop an object on the ground, then it is meaningless to describe it as fact.
Since the existence or nonexistence of a deity has no predictive value to me, it has no meaning to me in the realm of fact. It only holds meaning in the realm of imagination.
I drift in and out of using references to the divine in my writing, depending on what information I'm looking to convey and whether or not I think the frame has value for communication purposes. But I don't consider the existence or non-existence of God to be part of the realm of fact. I would only do that if a belief in the existence or non-existence of a divine being (in a very general sense) were necessary to increase the accuracy of my predictions, but as far as I can tell, it makes no difference either way.
However, if we're talking about a specific form of God, such as the Christian God, then I found that the accuracy of my predictions in life increased when I shed that belief. My understanding of reality appeared to be less accurate when I viewed it solely through a Christian lens. For example, I became a better student in school after I dropped Christianity (something that seemed to bother some of my Christian friends).
A belief in the divine has less to do with Truth and more to do with Power though. It's largely a question of what specific beliefs are adopted and whether or not they're empowering to the individual believer. To the degree such beliefs are empowering to me, I utilize them consciously.
Since I was raised Catholic, I am still discovering disempowering beliefs that were installed in my youth, beliefs which are inaccurate and/or disempowering. When I discover such beliefs, I do my best to break them down and shed them.
In the past few months, for instance, I've become aware of limiting beliefs related to sexuality, beliefs that were installed when I was very young and that I wasn't even consciously aware of. I've been shedding them as I discover them. This has been very helpful in giving me the ability to enjoy new experiences that were previously impossible for me. By releasing the disempowering beliefs, I now have an increased capacity to identify and fulfill new desires without being blocked.