Romans 8:9-11, 14

But ye are not in the flesh, but in the Spirit, because the Spirit of God dwells in you. Now if anyone does not have the Spirit of Christ, that person is not of him. ¶ But if Christ is in you, the body is truly dead because of sin, but the Spirit is alive because of righteousness. And if the Spirit of him that raised up Jesus from the dead dwells in you, he that raised up the Christ from the dead shall also quicken your mortal bodies by his Spirit that dwells in you.

For all that are led by the Spirit of God, the same are sons of God.