Romans 8:9-11, 14

But ye are not in flesh but in Spirit, if indeed God's Spirit dwell in you; but if any one has not the Spirit of Christ he is not of him: but if Christ be in you, the body is dead on account of sin, but the Spirit life on account of righteousness. But if the Spirit of him that has raised up Jesus from among the dead dwell in you, he that has raised up Christ from among the dead shall quicken your mortal bodies also on account of his Spirit which dwells in you.

for as many as are led by the Spirit of God, these are sons of God.