BLACK (absence of light) + MAIL/MAEL (speech) aka ignoring perceivable for suggested. Perceivable (light) goes through one; while suggested (shadow) tempts one to hold onto.

Few utilize suggestion to intercept perceivable going through many, hence tempting them to put on shades of ignorance. Meanwhile; many are tricked to believe that few are casting suggested light upon them..."understanding" doesn't imply light received; it implies "standing-under" aka standing in the shadows of others.