Notice that blessings are upon the head of the just. These blessings are visible and plain to see. This does not necessarily speak of material wealth or riches, but joy, contentment, and peace that come through living a life of obedience to God. The wicked, on the other hand, have their mouths covered by their wickedness. The picture here is that the wicked are always speaking in a way that tries to conceal their wicked intent, or past wicked actions. It also pictures the mouth as a fountain. Every word that is coming out of the wicked person’s mouth has been filtered by their heart of violence and wickedness. We can contrast this and notice that the words that are coming out of the just man’s mouth are being filtered by a heart that is full of blessings and righteousness.