Romanos 8

15 You have not for the second time acquired the consciousness of being –a consciousness which fills you with terror. But you have acquired a deep inward conviction of having been adopted as sons– a conviction which prompts us to cry aloud, »Abba! our Father!«

16 The Spirit Himself bears witness, along with our own spirits, to the fact that we are children of God;

17 and if children, then heirs too–heirs of God and co-heirs with Christ; if indeed we are sharers in Christ's sufferings, in order that we may also be sharers in His glory.