Dear God, I know that my sin has separated me from you. Thank you that Jesus Christ died in my place. I ask Jesus to forgive my sin and to come into my life. Please begin to direct my life. Thank you for giving me eternal life. In Jesus' name, Amen.
That's it! You can officially welcome this person into God's family--your new brother or sister in Christ!
Just as a baby is not born and then left to fend for himself, so a newborn believer in God's family needs some guidance. As the one who introduced him or her to Christ, you should attempt to help this new believer grow.