I’m intrigued by walking. Especially our Christian walk. Lots of good verses: https://www.openbible.info/topics/walk (Especially, Eph 2:10!) This could be a sermon. The term elemental is a good term. Here’s an article that could be shifted a bit to make it relate to our Christian walk. http://footnotesonwalking.blogspot.com/2016/07/elemental-walking-earth-air-fire-and.html