There are no reasons for the non-existence of a god ("reason" isn't really compatible here). We can only analyse what we see around us using our own mental faculties and navigate whether these things came (or could have come) from a superior maker.
Nobody can disprove the existence of a god for the same reasons that nobody can prove it. The very nature of a supposed god forbids us to do so. In the meantime, something pretty strong can be said about the probability.
Minimalist provided a link to Talk Origins for you - I want to stress the importance of that site. It is a pretty concise archive of different arguments and elaborations that you might find helpful.
Footnote: Atheism is the rejection of a god-claim. Nothing more. It is not a belief that is opposite to that of a theist, it is unbelief. Kindly keep this in mind when you chat with your atheist friends again. And welcome!
Nobody can disprove the existence of a god for the same reasons that nobody can prove it. The very nature of a supposed god forbids us to do so. In the meantime, something pretty strong can be said about the probability.
Minimalist provided a link to Talk Origins for you - I want to stress the importance of that site. It is a pretty concise archive of different arguments and elaborations that you might find helpful.
Footnote: Atheism is the rejection of a god-claim. Nothing more. It is not a belief that is opposite to that of a theist, it is unbelief. Kindly keep this in mind when you chat with your atheist friends again. And welcome!
My candle burns at both ends;
It will not last the night;
But ah, my foes, and oh, my friends -
It gives a lovely light!
It will not last the night;
But ah, my foes, and oh, my friends -
It gives a lovely light!
