What does the Bible say about the first and second coming of Christ?

In the Scriptures, particularly in the Old Testament, references to the first and second advents of Christ are often intertwined. Prophets spoke of the Messiah who would come to offer salvation and later to enact judgment. For instance, Isaiah highlights the dual role of the Savior leading to salvation and judging His enemies (Isaiah 62:10-63:6). This theme continues in the New Testament, where Jesus' first coming fulfilled the prophecy of God’s salvation for His people, while His second coming promises to consummate that salvation and sentencing for the unrepentant, as seen in Revelation 20:1-3.