A friend and I are going through a bible study about "walking the walk" instead of just "talking the talk." This version of Ephesians 4:29-32 from The Message is worth sharing (emphasis mine):
Watch the way you talk. Let nothing foul or dirty come out of your mouth. Say only what helps, each word a gift. Don't grieve God. Don't break his heart. His Holy Spirit, moving and breathing in you, is the most intimate part of your life, making you fit for himself. Don't take such a gift for granted. Make a clean break with all cutting, backbiting, profane talk. Be gentle with one another, sensitive. Forgive one another as quickly and thoroughly as God in Christ forgave you.