The words that we use day to day can hurt or help us. According to the word of the Lord we are to speak encouragement and love into each other's lives.
Our words are to feed goodness into peoples lives but not take the place of the FOOD that our Father has left for us. The bible gives us scripture about the word of the man's mouth:
Pro. 6:2 If you have been trapped by what you said, ensnared by the words of your mouth..
Pro. 18: 20-21 From the fruit of his mouth a man's stomach is filled; with the harvest from his lips he is satisfied. The tongue has the power of life and death, and those who love it will eat its fruit.
When you say you have faith, the words you speak in your life and in others, must be representative of that. Talk without doubt; pray without doubt....confess good things in your lives....in your family, in your marriage.
God's grace and mercy allows us to wake up everyday and choose to be with HIM and about HIM. Our words should reflect the same that we are walking the walk.