> How can you have mysticism without belief in God? What is it your uniting with then, if there isn't a God?
You would have more out of it if you would answer this yourself.
However, I will do it too.
The talk is rarely about a father figure creator God (I'm saying it in this way because usually, not all people, but many assume that the talk is about: "Is there an all-knowing father figure in the sky, or not?") As I mentioned, start with one of the earliest texts: "Tao Te Ching" and you will see what I mean. Mysticism, spirituality, religion, is to my knowledge, often (probably always) about practice and experience of some form of divinity. However, this doesn't mean that you do not have at least some doubt. In fact, I don't know of any legitimate,non-dogmatic and genuine mystic or saint who did not experience doubt in one way or the other (think of St. Augustine's “There is no saint without a past, no sinner without a future."
It is not: "I know there is a God, and that's it, the talk is done forever". It's usually more: "How can I not believe in X when I've experienced and seen Y?"
Examples:
Simone Weil writes:
> Religion in so far as it is a source of consolation is a hindrance to true faith; and in this sense atheism is a purification. I have to be an atheist with that part of myself which is not made for God. Among those in whom the supernatural part of themselves has not been awakened, the atheists are right and the believers wrong.
Martin Buber:
>The atheist staring from his attic window is often nearer to God than the believer caught up in his own false image of God.
Jesus:
> Father why hast thou forsaken me
To doubt, or as some people like to fashionably say skepticism (while, often, they specifically mean "glorified" atheism) is, it seems to me, a characteristic not (exclusively, or at all) of atheism but of theism. Without belief there's nothing to be doubted, and the other way around, too. Despite all of it, despite the fact that there is one rational explanation, the (mystical/religious) experience witnessed the person cannot or will not deny it, whether he/she says that they believe in God or not (there's more to it than words can say)