From hearing: "Walk in the Spirit"
I visualize this:
You know the efffect they use in some shows/movies/commercials where a person walks out of themself, sometimes as a ghost once they're dead. Well picture that ghost type thing, but you are able to see it, and have to try to stay in it, so you're actions are one with it. Figuratively of course. That's what that phrase "Walk in the Spirit" makes me think.
At the bottom of your screen is the verse, "I baptize you with water, but He will baptize you with the Holy Spirit." Is that the difference between the two? Or am I complicating it more?