Romans 8:15 NIV

1 Corinthians 2:12 NIV
What we have received is not the spirit of the world, but the Spirit who is from God, so that we may understand what God has freely given us.

1 John 4:18 NIV
There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.

2 Timothy 1:7 NIV
For the Spirit God gave us does not make us timid, but gives us power, love and self-discipline.

Ephesians 1:5 NIV
he predestined us for adoption to sonship through Jesus Christ, in accordance with his pleasure and will—

Galatians 4:5-7 NIV
to redeem those under the law, that we might receive adoption to sonship. Because you are his sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” So you are no longer a slave, but God’s child; and since you are his child, God has made you also an heir.

Hebrews 2:15 NIV
and free those who all their lives were held in slavery by their fear of death.

Romans 8:16 NIV
The Spirit himself testifies with our spirit that we are God’s children.