We should not understand the OT Scriptures as void of Christ. He is the summation of the OT Message.
Without quoting a specific writer of the OT, Philipp and Andrew were convinced they found the Messiah based on their understanding of the OT (John 1:41, 1:45). Jesus said that the Law and prophets were about Him (Luke 24:44-46). The Apostle Paul wrote that Christ's death and resurrection were according to the Scriptures (1 Corinthians 15:1-4).
The gospel we hear of in the NT is grounded in the OT.
OT WITNESS TO THE DIVINE SON
The Church did not create the notion that Jesus was divine. This doctrine is rooted in the OT and even Jesus' own words.
1. "Lord" and "Son of God" - Jesus' followers confess Him as Lord (Luke 2:11, John 20:28, Romans 10:9). Lord is kyrios in the Greek and is the word many Jews used for the Adonai which is Hebrew for Lord. They are using a title reserved for Yahweh. The title Son of God is an OT term as well (Psalm 2:7).
2. Preexistent One - The world was created through the Son (Genesis 1-2, Hebrews 1:2, Colossians 1:16). The gospel of John chapter 1 also alludes back to Genesis 1-2 to disclose who the Word actually is--the eternal 2nd person of the Trinity. Jesus is said to have saved a people out of Egypt (Jude 5, Exodus 13-14). Jesus even uses the name of God to refer to Himself (John 8:58).
You can use the 3 step processed previously outlined in "Tools of the Trade" summary to see how the apostle John uses the OT to help us see Christ (John 1/Genesis 1).
3. God of Israel (as the Second Person of the Trinity)
a. Recipient of Worship - In Philippians 2:10-11 Paul inserts Jesus into Isaiah 45:22-23 to make it known that Jesus is the only God to whom worship is due.
b. The "Lord" of the Shema - In 1 Corinthians 8:4-6 Paul reminds these Christians that idols do not exist and that there is one God, one Lord. This takes us back to the Shema (the Jewish confession of faith) in Deuteronomy 6:4. Paul is asserting the divinity of Jesus by using the OT.
c. The Coming Lord - Mark 1:2-3 affirms that Jesus is God incarnate by citing Malachi 3:1 and Isaiah 40:3. Some manuscripts say "the prophets" and not "Isaiah" in Mark 1:2.
d. God to God - In Hebrews 1:8 we have the author referencing Psalm 45:6-7 and saying that the Father God says that His Son is God.
OT WITNESS TO THE HUMAN SAVIOR
After His resurrection, Jesus snuck up on a couple of disciples (not those of the 12) and they were talking about the recent events that transpired. They are discouraged and Jesus calls them foolish for not believing what the prophets wrote about Christ (His sufferings and being glorified). He then began with the writing of Moses and then went through the Prophets to explain how all the Scriptures were about Him.
1. Incarnate One - Jesus was born in the likeness of human flesh (Philippians 2:6-7, John 1:14).
a. Matthew 1 and Isaiah 7 - In Matthew 1:23, he quotes Isaiah 7:14 to show that the virgin birth was a sign of God's plan to save and redeem.
b. Hebrews 2 and Psalm 8 - Hebrews 2:9 cites Psalm 8:4-5 to show that it was God who took on flesh and was made lower than the angels in the act of the incarnation.
c. Hebrews 9-10 and Psalm 40 - Christ is the one who said the words of the Psalm and gives His body as the supreme sacrifice.
d. Revelation 12 and Genesis 3 - The boy born of a woman in Revelation 12 is Jesus who fights the dragon. This is an allusion to Genesis 3:15 where the serpent bruises the heel of the Seed of the woman while He crushes the head of the serpent. The physical birth of a Savior was always part of God's eternal plan.
2. Prophet - Jesus used parables in a lot of His teaching. This was how the prophets often taught and applied the Law of God. Jesus cites Psalm 78:1:2 to show how He is a prophet and teaching as a mouthpiece not just "for God" but "as God." Matthew 5 shows Jesus dispensing the law on a mountain as Moses received the law of God on a mountain and gave it to Israel. The points to the prophetic ministry of Jesus as the ultimate fulfillment of Deuteronomy 18:15. Jesus is the consummation of the prophets (Hebrews 1:1-2).
3. Messiah/King - Messiah means anointed one--Mashiach in Hebrew, Christos in Greek, Christ in English. Sometimes priests were anointed as were kings (Exodus 30:30, 1 Samuel 2:10). Jesus is the anointed king of Israel.
a. Heir of David - David was anointed King (1 Samuel 10:1). God makes a covenant with David to give him an heir and "to establish the throne of his kingdom forever (2 Samuel 7:13). The Davidic dynastic appeared to come to a halt because of the Babylonian exile. In Isaiah 9:6-7 we see the prediction of a son who will rule on David's throne. Matthew goes through great length to connect Jesus to David. The angels declare that Isaiah 9:6-7 applies to Jesus, hence the title Son of David. The magi in Matthew 2:5-6 cite Micah 5:2-4 to show that it's not just the place of Jesus' birth that is predicted (Bethlehem) but that a David Ruler has arrived according to God's plan.
b. Star/Scepter of Israel - Revelation 22:16 speaks of the bright and morning star. This is an allusion the prophecy of the pagan prophet Balaam. In Numbers 24:7 he spoke of a star rising from Jacob and a scepter coming out of Israel. These are synonymous ways of saying the same thing. The magi report that it was the rising star of the king of Israel that led them to come and worship.
c. Lion of Judah - The scepter that Balaam alludes to is first mentioned in Genesis 49:10. It was from Judah that a scepter was predicted. Judah is described as a lion (Genesis 49:9). Revelation says that Jesus is the Lion of Judah (5:5).
4. Priest and Sacrifice - Jesus is the Great High Priest (Hebrews 2:17). Yet Jesus is from Judah, not Levi. How do the NT authors establish His priesthood. Hebrews tells us Jesus is from a different order of priests. He's after the order of Melchizedek not Levi (Hebrews 5:10). This mysterious figure was King of Salem and a Priest of God. In Psalm 110:1,4 there is a ruler enthroned at God's right hand who is after the order of Melchizedek. Hebrews 5-7 pulls from Genesis 14 and Psalm 10 to show that this Great High Priest is Jesus.
Jesus is not just priest but the sacrifice as well. Jesus is the Lamb of God (John 1:29), our Passover (1 Corinthians 5;7) and the Lamb who was slain (Revelation 5:12). Hebrews 9-10 makes it clear that Jesus fulfills these sacrificial rituals. Paul alludes to Leviticus 16:2 and Leviticus 5:6-7 in Romans 3:25 and Romans 8:3.
Jesus lifts his hands to bless his disciples before His ascension (Luke 24:50). This evokes the image of the priestly benediction of Numbers 6:22-26. Then He entered the true heavenly tabernacle (Hebrews 9:24).
5. Covenant Mediator - Hebrews 9:15 says Christ is the mediator of the new covenant which is discussed in Hebrews 8:8-13, Hebrews 10:15-18. Jesus words at Passover (1 Corinthians 11:25) remind us of His shed blood that ratifies the New Covenant--an allusion to Exodus 24:8. As Passover in Exodus led to the Covenant God made at Mt. Sinai, so Jesus' shed blood leads to the Covenant He makes with us. At the climax of the covenant ceremony in Exodus, Moses serves as mediator by splashing blood on the people to bond them to the Lord. The leaders ate and drank in the presence of the Lord. The Lord's supper recapitulates this event. In summary, in the OT we see Passover meal-->Exodus-->OC in blood-->Fellowship Meal. The NT correlation then is Christ's death-->Our Salvation-->New Covenant-->Lord's Supper.
6. Son of Man - Jesus uses this title of Himself to show his current authority on earth (Mark 2:28), his impending suffering (Mark 9:31) and his glorious return (Mark 8:38). Jesus allusion to this title from Daniel 7:8-14 helps to veil his identity while revealing it to those who are attuned to the Word. Revelation 1;14 takes the attributes of the Ancient of Days described in Daniel 7:9 and applies them to the Son of Man mentioned in Daniel 7:13. This lets us know that the Son of Man is more than Jesus human. He is also Divine.
7. Vindicated Sufferer - Jesus connects His identity as the Son of Man to the coming sufferings He'll undergo. But Daniel 7 does not speak of any suffering of the Son of Man. So where does this notion come from?
a. Mistreated Prophets - Elijah suffered (1 Kings 19). Micaiah was imprisoned (1 Kings 22:26-27). Elisha was mocked (2 Kings 2:23-25). Jeremiah was beaten and imprisoned (Jeremiah 20:2). The list goes on. Jesus identifies Himself with prophetic suffering (Luke 13;33-34).
b. Isaiah's Servant - Isaiah 52:13-53:12 speaks of a suffering servant. This servant song is found in the gospels, Acts, Romans, Hebrews and 1 Peter.
c. Psalmist of Sorrows - In Luke 23:46 Jesus alludes to Psalm 31:5. In Matthew 26:38 Jesus alludes to Psalm 42:5-6. There are other passages as well in the NT that show Jesus' connection to the suffering in the Psalms.
SUMMARY & CONCLUDING THOUGHTS
In each of the cases where the NT uses the OT, we need to see whether a text is being cited, quoted or alluded to. Then a word comparison must be done, followed by observations about the broader OT passage. Then we can do a re-mix of the NT passage and see whether the NT authors are showing a prediction, pattern or prescription. These all converge in Christ. What sort of human can accomplish all the ways the NT shows the OT speaking of Christ? Only a divine one! Jesus is the thread of the OT and NT Scriptures. He brings newness to the OT Scripture and is the key to fully understanding them.