We read in the Scriptures that God went before (and, in one case, behind) the Israelites in a cloud by day and a fire by night.
Could there have been some (currently known) scientific phenomenon responsible for this cloud/fire? Don't get me wrong, I'm not saying that God wasn't responsible for it ultimately, but it would seem that God does use natural methods to accomplish at least some of his goals.
New Testament Greek
- The Cloud and the Fire