A few months ago I was still a believer in God. I was open minded though, not closing the door to consideration of other possible explanations. So, I accept that believers can be, though very often are not, open minded about other possibilities and explanations for the universe, life, etc.
Under the surface though, I was unable to completely prevent my mind from honestly admitting that I was denying effective argumentations for rejection of 'faith' and 'belief' in favor of reasonable understanding of this world around us. In time, some of the same sort of arguments, reasoning, that I now accept, were churning in my mind, wouldn't let me get settled into a fog again that was 'mystical, spiritual, or faith-based'.
Some atheists here on JWN and elsewhere were making logical, coherent, sensible statements. I was denying those statements, defending God, Jesus, the Bible, invisible people in hidden places pulling strings that never seemed to really solve anything. My open mindedness was the biggest blessing in my life. I morphed. In a relatively short time, I went from one who was shallow, accepting of fantastic stories about how a snake and a naked lady were responsible for all the worlds evil, to a skeptic. I found out in short order that reality, not smoke and mirrors of faith, is far more satisfying, far more palatable to my evolving mind.
There are those who claim that they remain Christian and open minded. This might be true - but open minded and religion don't harmonize well. It will set up cognitive dissonance for many. This is IMO the reason that so many people attempting to 'heal' from spiritual abuse become atheists in time. They look more closely at the other 'choices' in religion, and find that there are really no choices but two: 1] swallow - hook line and sinker - stories of complete nonsense about how we came to be, how cities were felled with people marching around them, how 'god' could murder on one hand and be the 'god of love' on the other, etc. 2] pull back the curtain [yes the same one we pulled back to reveal Jw's a farce] and see that the OZ is just a fantasy - a hologram - a pretense adopted and adapted from our tribal, superstitious ancestors.
Where it goes from there is varied. But it is the beginning of wisdom to be open minded.
Jeff