The mouth of the righteous is a fountain of life, but the violence overwhelms the mouth of the wicked.
This is the second time part b is mentioned. Part a supports love covers a multitude of sin (verse 12). Encourage and edify one another. My words can be a fountain of life or a source of death. I've written before on this point. I want my words to be a fountain of life for others (and me). My self talk is often worse the what I speak to others. Do my words align with God's words? Am I speaking truth? God's word is the fountain of Life, direct from Jesus!