What Are Some Good Ways to Start a Conversation About God with Family Members?

Questions about how to start a conversation about God with non-Christian family members, how to keep from becoming emotional when discussing faith issues with family, and the best way to alert people to the fact that they’re members of a cult.   What are some good ways to begin (and have) a conversation about God with non-Christian family members? How can I keep from becoming so emotional when discussing faith issues with extended family members whose salvation is at stake? What is the best way to alert people to the fact that they’re members of a cult rather than a church that follows Jesus?