Romanos 8

15 For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, by which we cry, Abba, Father.

16 The Spirit himself beareth witness with our spirit, that we are the children of God:

17 And if children, then heirs; heirs of God, and joint–heirs with Christ; if so be that we suffer with him, that we may be glorified together.