Romans 8:16 The Spirit himself bears witness with our spirit that we are children of God, 17 and if children, then heirs– heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him. (ESV)
Everyone who’s attended Christian church for any length of time has been taught, “What is true of Christ is true of us in him.” The Holy Spirit unites the church and Christ through believer’s baptism. We can pray the psalms with Christ, because, as believers, He is in us and we are in Him.
Romans 6:3 Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? 4 We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. 5 For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his. (ESV)
Nowhere is the victory of Christ more pronounced than in Psalm 21. Andrew Bonar rightly divides this psalm into three sections: 1) Verses 1-7: “Messiah’s exaltation after his suffering,” 2) Verses 8-12: “His future acts when He rises up to sweep away his foes,” and 3) Verse 13: “The cry of his own for that day, as their day of realized bliss.” (Andrew Bonar, 72)
What is true of Christ is true of us. In Christ we have our resurrection from difficult situations that threaten to drown and annihilate us. In Christ we have our victory over our enemies. These include death itself, fatigue, despair, persecutors, fear, uncertainties, hopelessness, and many others. Finally, our end will be glorious, as we share an eternity of praise and thanksgiving for the Father of the One who set us free.