There is much hub bub these days about the spate of books extolling atheism. Specifically, The God Delusion by Richard Dawkins, The End of Faith by Sam Harris, and God is Not Great by Christopher Hitchens. I very much like these books, and can go along with them for the most part. But not entirely. I call myself an "agnostic", and though I think all of these books plausibly attack that position as weak and to some extent cowardly, I want to hold to that label. I think it is justified, and believe that I can defend it..
To believe that it is justified, one might ask if there is any reason at all to say that you don't know whether something exists when there are no clear reasons for thinking that it does exist. The "it" in this case is a God, a set of gods, or a Deity...some kind of being or beings that in some way brought about the Universe.
First consider the "Deist" position. This was I believe held by Thomas Jefferson and others during that era we call "The Enlightenment". The idea is that there was some agency, or God, that designed and created the universe---but after doing so, he backed off from it, set back, and did not interfere with it. In particular, such a position rejects the organized religions, and the Abrahamic religions, and usually argues that the Creative Being does not concern Itself/Himself/Herself/Themselves with the doings of humanity.
The theist position, by contrast, adds to the Deist creation idea with the postulate that the Creative Being does continue to interact with the world, in particular, with the goings on of the human race. The Abrahamic religions would be, of course, theistic religions. Examples of such interactions might be selected "miracles", the dictating of certain rules or codes of conduct (e.g., The Ten Commandments), the Incarnation of Christianity, and so forth.
While I can not say that I subscribe to either of these positions, Deism or Theism, I do not agree that there are absolutely no reasons for considering the beliefs to be plausible.
I want to give two examples. One is the evidence, admittedly weak, for Theism. The other is somewhat stronger, to my mind, arguing for Deism.
The Deistic argument first, and I will here be very brief, hoping to enlarge upon this in a later post. This is based on the observation that the universe not only exists---itself a bizarre and vertigo-producing fact---but also that physics seems to suggest that the fundamental laws and parameters of the universe seem to be fine tuned to allow life and consciousness to form. Furthermore, the prevailing theory that the whole thing started with what is called the "Big Bang" seems to suggest that something started it. I know, of course, that there are alternative theories here to Deism---the parallel universes and such. But common sense---dubious in this context, it must be admitted--- seems to that the whole thing was created and designed by someone or something. There is no element here for me of "faith" at all, rather it is just a sort of intuitive feeeling. And I honestly don't know if the modern "Design" argument is very convincing to others, as there is some subjective judgement here.
The other argument, the one for Theism, is I admit much weaker, and much more subjective. This is based on art and music that has been inspired by one particular theistic religion, namely Christianity. The music, in particular, seems to me to be inspired beyond human capability. I think especially of the music of Bach, Palestrina, Handel, and Victoria. There are of course many others, but Bach stands out above all the rest, in my estimation. As I have said, this is a weak argument, but nevertheless it has some weight with me.