Romans 8:9-11, 14

But you are not ruled by your sinful selves. You are ruled by the Spirit, if that Spirit of God really lives in you. But whoever does not have the Spirit of Christ does not belong to Christ. Your body will always be dead because of sin. But if Christ is in you, then the Spirit gives you life, because Christ made you right with God. God raised Jesus from death. And if God’s Spirit lives in you, he will also give life to your bodies that die. Yes, God is the one who raised Christ from death, and he will raise you to life through his Spirit living in you.

The true children of God are those who let God’s Spirit lead them.