A quick look at mist, spirituality and the meaning of the Mist card in the Go Deeper oracle.
In my oracle system (which isn't really at all systematic!) the Mist card represents deep spirituality and mystical experience. From what I can gather of their etymology, the word mist does not share a common root with mystery, mystic, etc. I find that a little disappointing, because like most people, I find Mist a bit mysterious! The way it comes and goes, and obscures our vision, so that although it may be that there is no common shared origin for these words, they are merging somewhat in the way we think of them now.
Webster offer us this:
MYSTICAL 1 a : having a spiritual meaning or reality that is neither apparent to the senses nor obvious to the intelligence <the mystical food of the sacrament> b : involving or having the nature of an individual's direct subjective communion with God or ultimate reality <the mystical experience of the Inner Light>
Mist - The touch of another world. In losing ourselves we find something greater.
The Mist of the mystical experience tends to come when we're ready, not when we think we're ready. If this card occurs in a reading I see it as a positive thing. Someone is having, or will have, wonderful experiences of a spiritual nature. However, in order for such experience to happen, and be meaningful, we need to let go of ego and allow perceived reality to dissolve, in order to make room for that "something greater."