The Psalms testify about Christ’s person and ministry. Almost all aspects of His work in the plan of salvation are seen in the Psalms. In various ways, Christ’s life and work are prefigured and predicted in them, often with remarkable accuracy.
The topics revealed in the Psalms include Christ’s deity, His Sonship, His obedience, His zeal for God’s temple, His identity as the Good Shepherd, His betrayal, His suffering, His bones not being broken, His death, resurrection, ascension, priesthood, and kingship. It’s all there, as predicted many centuries before Jesus came in the flesh.