Things not seen

I started another box painting. Again I've been shown something more thru this series. It seems so obvious now that I'm aware of it. Faith. A firm conviction in what cannot be seen. In the 2nd book of Corinthians, chapter 4, at the end of verse 18 it states, "the things which are seen are temporal, but the things which are not seen are eternal." What's inside the box? What's outside the box? Can we see the invisible if we look with the heart and not our eyes? A complete stranger emailed me a few days ago after finding my work online. Judging by their response to the box series they saw the invisible and were changed. I can't put into words how encouraging that is.