How do we know Christ is the blessed man described in Psalm 1?

The blessed man of Psalm 1 ultimately points to Jesus Christ, who embodies the perfect fulfillment of the law. Scripture reveals that Christ is the first and the last, the beginning and the end, as mentioned in the Sermon on the Mount. He rejected the counsel of the ungodly and delighted in the law of God, fulfilling every jot and tittle of the law perfectly. As the second Adam, Christ's life exemplifies what it means to be truly blessed—His thoughts, actions, and meditations were always aligned with God's will. Therefore, being in Christ means being covered by His righteousness.