"The mouth of the righteous is a fountain of life."
What a beautiful picture: our words, which overflow from what's in our hearts, can bring life!
Only when we are are filled with the Spirit can we use our words in this edifying way. It is something that comes from God alone. "For with You is the fountain of life". (Psalm 36:9) When He fills us with His life, we can in turn use our words to bring life to others!
While our words can be a source of life, on the other hand we can use our words for great harm. Do your words bring life, or are they destructive? If you were to think over what you said today, how would your words be categorized?