"I have hidden your word in my heart that I might not sin against you." Ps 119:11 from the DailyBibleVerse.org
I have many friends, some are Christians others are not. When I go to AA meetings, some people use profanity. It's something I'm not entirely successful at eliminating from my vocabulary, although I do my best to honor God with clean language. Each morning I begin the day by reading God's word and meditating on the message for that day. I also read several chapters from the book of the Bible I'm reading at the time - right now it's Isaiah.
The more I practice the principles God would have me follow, the easier it is to resist following those who choose the way of the world. God's word lives in my heart and it follows that I will choose to show others what loving God means by acting that way He would have me live.