Your tongue is a very powerful tool and it has the power of life and death. I always remember when someone helps me with their words. It might not seem like a big deal to them, but I always cherish a good word. Saying kind words to people cheers people up when they are having a bad day.
They bring healing to the soul. They go better with advise, just the way @sirknight admonishes all parishioners with encouraging words. When correcting others no one likes when someone is cruel with their words, but everyone can appreciate and will listen to gracious words.
Use your speech to encourage and uplift others. In your Christian walk of faith keep kindness in your speech because it is indeed very valuable.