When people say that something is in the gray area, I take it to mean they're not sure whether it is right or wrong.  Though the speed limit is seventy miles per hour, some people read it as eighty.  We may know that if we consistently break the laws of health a day of reckoning will come.  When something is deemed gray these days, we tend to tilt it into being OK.  Incredibly, we take more risks in matters regarding our eternal destiny than we do in temporal things.  Jesus saw things in black and white.  He differed from us in that He could see black where we see only white, and He saw white where something we see only black.  The grace of God is not a gray area.  If we don't train ourselves to see things in black and white, we won't be able to distinguish right from wrong and thus we will be setting ourselves up to lose our salvation.  "There is a way which seemeth right unto a man, but the end thereof are the ways of death" (Proverbs 14:12).