I stopped being a JW altogether when I went into college and took philosophy classes and started thinking for myself. I understand a lot of you former JW's are still theists, in fact it seems probably the majority of you are. I am agnostic, meaning I don't feel there is enough evidence for against either cause to subscribe my lifestyle to one belief.
The biggest arguments I have for a JW, to turn them agnostic are as follows:
JW Argument: Jehovah is for sure real because look at how complex our world is, this couldn't have possibly came about on accident! Life happening the way it is now on accident through a "big bang" would like a tornado going through a junkyard and assembling a 747!
My rebuttal: Complexity is all relative. For example. If a human to Jehovah is the same leap as an ant to a human, then consider this:
Ant spends a year with 1000s of other ants building an ant hill. Upon completion of the project, the wind blows a nearby mound of dirt into a very similiar shape. In the ant's extremely limited understanding of the universe, this random reaction of two elements seems like a miracle because it created someone just as complex as it spent a year building.
Humans spend the last two hundred years perfecting optics from a pinhole camera to digital technology, yet it is still inferior to the human eye. The human eye must be intelligently created because it is so complex (to us), how could it possibly be created on accident?
God (or his equivalent) looks down at the humans on earth (ants) and see's us spending 200 years trying to perfect a mechanical eye (ants building an ant hill), then laughs when we marvel at the human eye, when to him it was just celestial wind blowing particles together that created it.
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JW Argument: There is no way the universe got here on accident, after all everything has a maker, how could it just appear one day?
Rebuttal: How was god never born, but always existed? You readily accept that as being unfathomable so you accept it knowing it is beyond human wisdom to understand. How can you accept one Paradox but not another? How is an all powerful being that has no beginning and no end any harder to imagine than a universe creating itself from an explosion of particles?
I am not an atheist, like I said I am agnostic. But this is the argument I give any JW relatives when they ask me why I no longer believe.
I look at it like this, both Atheism and Theism cannot be proven, and cannot be disproven. If they could either be proven/disproven, the only people that wouldnt believe the proven one would be the same people that eat glue and lick windows.