The Psalter is the vicarious prayer of Christ Jesus for his Church. Now that Christ is with the Father, the new humanity of Christ, the Body of Christ on earth, continues to pray his prayer to the end of time. This prayer belongs, not to the individual member, but to the whole Body of Christ. Only in the whole Christ does the whole Psalter become a reality, a whole which the individual can never fully comprehend and call his own. That is why the prayer of the psalms belongs in a peculiar way to the fellowship. Even if a verse of a psalm is not one’s own prayer, it is nevertheless the prayer of another member of the fellowship; so it is certainly the prayer of the true Man Jesus Christ and his Body on earth.
Dietrich Bonhoeffer, Life Together