Brightness

It occurred to me today during church, why certain descriptions are what they are. I mean, feet as burnished brass, fire, lightning, etc.  What other bright sources of light were there in ancient times, the sun? It only makes sense to describe something incredibly bright in those terms.  Joseph Smith's ability to describe what he saw isn't significantly better in describing how incredibly bright the glory of heavenly being is. It seems like it's basically unimaginable how bright it is.  Just a thought anyway.