How do we know that Psalm 1 speaks of Christ?

The sermon emphasizes that all scripture, including Psalm 1, speaks about Christ as the blessed man. He epitomizes delight in God's law and fulfills the requirement of perfection that God demands. Christ, being without sin, did not engage in the counsel of the ungodly or walk in sin's ways. Instead, His life is a perfect reflection of obedience to God's Word. As believers, we are in Him and receive the blessings of His righteousness, made evident in how we live our lives. Therefore, when Psalm 1 discusses the nature of the blessed man, it is referring to Christ as the ultimate fulfillment of righteousness.