As Christians we know Romans 10:9-10 says, "If you declare with your mouth, "Jesus is LORD," and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved."
Once we believe, then our behavior starts to change. It changes because we believe the power of the Holy Spirit inside of us changes us from the inside out. Our "want to" changes. We behave differently because we believe differently. When we are born again we are birthed into a new family--the family of God. We believe that God's word is final authority. We read the word and it tells us we are now children of God and that Jesus will never leave us. We belong.
To teach your child means to train them by modeling.
Your children will become just like you.