God Is Spirit

             God is Spirit, and those who worship Him must worship in spirit and truth.
                                                       John 4:24

The Spirit Himself bears witness with our spirit that we are children of God. And if children then heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together.
                                                  Romans 8:16-17

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. For the earnest expectation of the creation eagerly waits for the revealing of the sons of God.                                 Romans 8:18-19