I don't believe in God, because there is no prove that a God or Gods exist.
If something is proven, then you don't have to believe in it anymore. Because then you
know it. Because most people don't
know if a God exists or not, they have to either believe it or not. That is the concept of faith.
(Edit: "Most people" because I have no proof that some people maybe do KNOW that God exists, or doesn't.)
But let's stretch the concept a tiny bit based on the assumption that we have to believe things we don't really know about:
How many of you really know anything about Physics, Quantum Physics, Biology, Evolution, Medicine, etc. ...
Meaning, considering that there are according to Stephen Hawking only three people in the world who really understood the relativity theory, meaning who really KNOW that it is correct, the rest of us, who is not that well informed about Physics and don't know how to do the math to check ourselves if it is correct:
We, who don't know for sure, we have to believe that others do.
When we go to a doctor, we have to believe that he/she knows what he/she is doing, although we can't be sure unless we are doctors ourselves (and even then our knowledge could be false or outdated or not specialized enough or too specialized).
Just because someone is an Atheist, doesn't mean that this person has no faith in anything. And BTW:
Richard Dawkins wrote...
We are all atheists about most of the gods that societies have ever believed in. Some of us just go one god further.
As for the concept of religion, Christopher Hitchens has in my opinion a good and valid point on how organized religion is the main source of hatred in the world:
[...]violent, irrational, intolerant, allied to racism, tribalism, and bigotry, invested in ignorance and hostile to free inquiry, contemptuous of women and coercive toward children[...]
The concept of God as it is preached by Abrahamic religions (Judaism, Christianity, Islam) is the concept of an almighty being, that sees everything, hears everything, knows everything and can do everything (everything like in "not imaginably huge fuckload of stuff"). On top of that the very same religions preach that God is pure good and of course pure love and compassion.
So a critical thinking theist ... ok, now I have to make a break to laugh my ass off ... ok, back to the topic: so a critical thinking theist might end up with the problem that you either rethink the concept of almighty and assume that
A) God might not be almighty and therefore can't undo all the wrong and evil in the world,
B) our concept of right and wrong is incorrect (what would explain the mysterious ways, right?),
C) God is a sadistic bastard or
D) God simply doesn't give a shit.
Nice book on that topic is btw
The Sparrow by Mary Doria Russell. I am warmly recommending it to everyone, who is critically overthinking his/her faith.
And just for the sake of it a few cutesy quotes at the end:
Robert A Heinlein wrote...
Anyone who can worship a trinity and insist that his religion is a monotheism can believe anything ... just give him time to rationalize it.
Christopher Hitchens wrote...
Religious exhortation and telling people, telling children, that if they don’t do the right thing, they’ll go to terrifying punishments or unbelievable rewards, that’s making a living out of lying to children. That’s what the priesthood do. And if all they did was lie to the children, it would be bad enough. But they rape them and torture them and then hope we’ll call it "abuse".
Ayn Rand (in a Playboy interview) wrote...
PLAYBOY:
Has no religion, in your estimation, ever offered anything of constructive value to human life?
RAND:
Qua religion, no—in the sense of blind belief, belief unsupported by, or contrary to, the facts of reality and the conclusions of reason. Faith, as such, is extremely detrimental to human life: it is the negation of reason.