Words have power, and we must not hesitate to use positive and good words to heal and edify people for their benefit.
Words can also damage and destroy healthy environments and relationships. We need to restrain our mouths and speak words that are good for ourselves and not good for others, because these words hurt people like a sword.
Ephesians 4:29 ESV
Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear.