What should I do if someone in my family doesn't believe in God?
Here's the answer:
Pray for him or her and be a good example of a child of God.
Families help us form and shape important things in our lives like attitudes, habits, and beliefs. Sometimes, though, those beliefs go against what the Bible teaches. So what if someone in your family, like maybe your mom or dad, doesn't believe in God? The Bible gives us some good answers to help in a situation like this.
First, always honor your parents, even if they don't believe in God. God's Word teaches us to love, honor, and obey our parents. Exodus 20:12 says, "Honor your father and mother." Ephesians 6:1 says, "Children, obey your parents as believers in the Lord." Obeying your parents can also be a good example to other family members who don’t believe in God. So listen to your parents and respect them. Tell them how much you love them, and show that by living a godly life.
Second, pray for your non-Christian family members. God can change their hearts and show them the truth about Him. Just remember, it’s God who does the work of drawing people to Him (John 6:44).
Finally, don't preach at them all of the time. But when an opportunity comes to share your faith, do it in love and respect.
Be glad that God has given you faith in Him, and pray that all of your family will come to know Him too. He doesn't want anyone to be lost, but to believe in Him and someday live with Him forever.
"Be wise in the way you act toward outsiders (non-Christians). Make the most of every opportunity. Let the words you speak always be full of grace ... then you will know how to answer everyone" (Colossians 4:5–6).
"Make sure in your hearts that Christ is Lord. Always be ready to give an answer to anyone who asks you about the hope you have. Be ready to give the reason for it. But do it gently and with respect" (1 Peter 3:15).