What is progressive revelation in the Bible?

Progressive revelation implies that God's message is gradually disclosed through Scripture over time. This means that earlier revelations, like those found in the Old Testament, were parts of a larger divine plan that becomes clearer in the New Testament. Ephesians 3:1-6 discusses how certain mysteries were previously hidden but have now been revealed through apostles and prophets by the Spirit, emphasizing the inclusion of Gentiles in God's salvation. This development of understanding does not alter the core truth of the gospel but enriches our comprehension of God's plan throughout history.