For you did not receive the spirit of bondage again to fear, but you received the Spirit of adoption by whom we cry out, "Abba, Father."

The Spirit Himself bears witness with our spirit that we are children of God, and if children, then heirs--

heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together.

For I consider that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us. [Romans 8:15-18]