How do we know God's purpose for humanity according to the Bible?

From the Scriptures, particularly in Genesis, we see that God's purpose for humanity was to have dominion over the creation. Adam was created to be the viceroy of God's kingdom, ruling over the earth under God's authority. However, due to the fall, this dominion was affected. The book of Hebrews emphasizes that this purpose is ultimately fulfilled in Christ, who as the second Adam restores God's plan. The promise of a new creation in Revelation reflects that purpose being fully realized, as believers will reign with Christ.