Tommy Keene summarizes the differences between how Old and New Testament authors viewed the first and second comings of Christ.
The idea that the Messiah Jesus would come twice was a surprise to his disciples. The Old Testament is clear that a Messiah would come, and it is also clear what the Messiah would do when he did. God’s servant-king would have mercy on the repentant (Mic. 7:18-20), save the oppressed, poor, and persecuted (Ps. 146:7-8), heal the sick (Isa. 35:5-6), preach and teach the righteous way (Dtr. 18:15-19), make atonement for his people (Isa. 53:4-6), and bring justice to the world (Isa. 11:1-5)—in sum, he would establish a perfect version of God’s kingdom, which would bring blessing to God’s people and against all His enemies (Ps. 2). When the Old Testament discusses theses things, it often looks like it happens all at once, but in fact a complete fulfillment would require two visits.
