Reference

Romans 8:16-17

As a child of God, each one is given a sure testimony from a Faithful Witness, and receives an invaluable inheritance that works in us and all of creation a redemption of all things, even suffering. The Spirit Himself testifies with our spirit that we are children of God, and if children, heirs also, heirs of God and fellow heirs with Christ, if indeed we suffer with Him so that we may also be glorified with Him. [Romans 8:16-17 (NASB)]