James 3:5 says, the tongue is a small member. Yet, it boasts of great things... (6) It is a fire... (8) no human can tame it...(9) We use it to bless the Lord, God and to curse people who are made in His image. 

Chapter 2 of Words that Hurt Words that Heal is entitled, "Aren't I Terrific?" It helps us to discern the words, the type of talk, that should come out of our mouths and ready us to dispense words of healing.