“Blessed are the pure in heart, for they shall see God.” (Matthew 5:8)
The Greek word translated in this verse for “pure” is katharós. Elsewhere in scripture, katharós is most commonly translated as the word “clean.” I suppose the word “pure” is used in this verse because it relates to the moral quality of a person’s heart, thus “pure” sounds more appropriate. But katharós is just the ordinary word for “clean.”
“Blessed are the clean in heart…”
Think of your heart as having a window. Windows do two things. First, a window allows light to come in so that we’re not living in darkness. Second, a window also enables you to look out and see what’s going on outside.
But if the window becomes dirty with accumulated grime so that it’s almost as if it’s completely painted over, you will live in darkness and you can’t see out.
The capacity to see God has something to do with the purity of your heart. And the grime that accumulates on the window of the heart that keeps us from seeing is not just any particular sin. It’s a particular kind of sin.