Use self-control! Here are two pitfalls that most of us fall into in this regard. One is we let the individual take us off the main point. Maybe it's the scoffer: “What about those who never heard the Gospel?” “Where did Cain get his wife?” Maybe it’s the person that just wants to share unrelated stories. You need self-control to prevent yourself from going down rabbit trails that will take you away from the four core elements of the Gospel (God-Man-Christ-Response). Second, you will need self-control to avoid getting emotional, angry, discouraged, frustrated or offended. Oftentimes these conversations can get very sensitive. You need to be filled with the Holy Spirit and produce the fruit of self-control even if the other person has lost his. Don’t let their spirit dictate your spirit.