If I defined God as a teapot in orbit around Mars, then we could verify atheism. However we can't verify atheism against an ever-changing definition of God, and we can't verify atheism against a definition of God that has no real-life implications, and so on. The problem is not atheism but the unwillingness or inability of theists to agree on a definition of God that has some solidity.
If you defined God as a teapot orbiting Mars, we'd be talking about different things entirely.
The philosophical traditions of all the great theistic religions have very much agreed upon a definition. We're not talking about another object in the universe out there somewhere, but that which makes all existence possible. The fullness of being, the infinite consciousness that makes individual consciousness possible. This isn't an ever-changing definition; it's actually the classical one.
You could say many more things about the Christian God, of course. I'm not sure what you mean by having "solidity," though. I'm very suspicious of any God concept that
does have real solidity, since I see anthropomorphism all over that, but seriously, if an atheist wants to fight me, they'd better get used to apophatic theology first. It's not invalid simply because it's slippery--those of us on the mystical side of theism have been thinking in these terms for millennia!
You gain many things by being an atheist instead of a Christian. You gain the money you might give to your church, you gain your Sunday mornings, you gain all kinds of things. Christianity is not free. I'm sure you agree with that ("take up your cross", etc). The same can be said about most other religions. Even seeking a relationship with God outside of a religion requires some effort - effort that the atheist can use for other things.
Well, I should specify that if you admire religious people and believe that Christianity offers a path that would lead to serious self-fulfillment, regardless of whether it's true or a matter of self-hypnosis, then you gain nothing by saying, "Well, I'm not sure if any of this is true so I'll go be an atheist instead."
I have a strong moral code that I'm pretty terrible at living up to, though, so Christianity doesn't really mean additional burdens at all. Obviously this will be different for different people, but things like meditation and contemplation are supposed to be good for you anyway, so if there are health benefits regardless of a religion's truth value, I don't see what you gain by expending that time in some random other pursuit. I think my anxiety levels have been dropping, actually.
Because a meaningful fact or truth will result in the believer making decisions that are more likely to achieve the desired results.
Not necessarily. A correct belief about unsustainable population growth could lead to eugenics or any number of other less than savory things.
The same reason that truth is better than lies. If my neighbor believes lies and makes stupider decisions, then it can potentially harm me. Just look at the problems caused by fundamentalists who object to the teaching of evolution in public schools. Everybody loses (assuming evolution is a good thing to learn of course - I know there are many members who disbelieve evolution for a variety of reasons).
I certainly accept evolution, but this is actually an interesting example, since I'm really not sure what societal value you could claim that knowledge of evolution has. People got along just fine believing that the sun went around the earth, after all. Scientific literacy is helpful for technological advances, but on the individual level, I don't see practical value to a lot of it. If I made up my own insane theories and called them quantum physics and never bothered anyone about them, I'm not sure what the problem would be.
I should specify that I'm not advocating against science--we just seem to be valuing truth for its own sake here, which is interesting.
don't follow your reasoning unless you defined God to be truth.
Ultimate truth, sure! My problem is more that I don't see why truth itself would have any value otherwise--there are situations where it's societally useful, true, but there are also situations where it is not. I don't see how you can avoid descending into a relativistic free for all where the "correct" thing to do is get as much as you can by whatever means you can at the expense of everyone else, while trying to trick the rest of society into continuing to behave in a moral manner. Perhaps it's evolutionarily beneficial to be moral, but you'd think that rising above evolution's constraints to truly embrace self-interest would be the way to go.
Again, not advocating this, and I frankly think it's unhealthy to think like this, but even if it is all a matter of evolution, it's an interesting bit of wiring.
[Edit] I should specify that I don't think that appeals to transcendental values are valid arguments for the existence of God. This is why my personal dilemma is between theism and deism, because I see an epistemological nightmare surrounding this particular question. Not really sure what I gain in insisting upon moral nihilism simply because I can't disprove it, though. Except depression, I suppose.
There is another implication of the potential for myself to become a Christian again by behaving like a Christian ("A Year With God" instead of a "A Year Without God"). The implication is that my reason for disbelieving in God might be no more reasonable than my potential reason for believing in God. Maybe I'm just reading the wrong books, behaving in the wrong way, etc. I'm not Bertrand Russell.
I would be careful trying to jump back into Christianity again without serious deliberation--swinging back and forth from one extreme to the other seems unhealthy. But you do seem a bit irrationally attached to one particular point of view right now, so starting to read stuff from the other point of view would help balance things.