Romans 8:10, 14-16

But if Christ is in you, then even though your body is subject to death because of sin, the Spirit gives life because of righteousness.

For those who are led by the Spirit of God are the children of God. The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “ Abba, Father.” The Spirit himself testifies with our spirit that we are God’s children.