Barefoot (i.pinimg.com)
I never knew that "Earthing" was a thing! 
I had a profound dream/vision many years ago where I was approaching the Gate of Pearl ("pearly" gates don't exist...look it up!). I was barefoot as was my guide. The grass under my feet felt like pure energy! I was unable to explain it! THIS post I found nails it!!! Just WOW!!! 
Hmmm...I wonder if our need to wear the least of sandals is God's way of protecting us from absorbing the bad energy from such a corrupt world?