Christians recognize one God, although God is three Persons—the Father, the Son, and the Holy Spirit. Christians recognize one Savior—Jesus Christ, the Son of God. Christians recognize one faith—a right relationship with God through the work of Jesus Christ.
Clearly God is timeless. He created time and remains outside of time, eternal and unchanging. Yet the Son of God entered creation and became subject to time. He was born to Mary and grew from a child to a man. When the time was right, Jesus offered his life as a sacrifice to rescue sinners. His sacrifice stands at the center of history. In one sense, it marks a change in the relationship between God and his people. In another sense, it makes no change, because the faith of Old Testament believers was a relationship with the very same Savior known by New Testament believers.
The chief difference between the two groups of believers is the time in which they lived. Old Testament believers were looking ahead to a promised Savior. New Testament believers look back to a Savior who kept all the promises of God. In both cases, believers are saved by God’s grace through faith in Christ. God’s Word in the Old Testament gave his people faith in Jesus, and God’s Word in the New Testament also gives God’s people faith in Jesus.
Although we cannot go beyond the words of the Bible to describe the content of faith before Jesus was born, we read that Abel and Noah both came to God through animal sacrifices. We also know that those sacrifices were pictures of the sacrifice of Christ. Adam and Eve heard the announcement that a descendant of Eve would crush the serpent’s head, but not without suffering himself. By faith in that message, Adam and Eve and Abel and Noah were saved and were guaranteed a home in God’s new creation.
In his letter to the Romans, chapter four, Paul specifically says that Abraham was saved by faith and not by works. He talks of the faith of Abraham enabling him to prepare to offer his promised son Isaac as a sacrifice to God. Abraham might have believed that Isaac was the promised Savior, the one who had to die so sinners could be rescued. By obeying the command of God, he acted out the history of salvation—a Father offering his Son—in a way that strengthened the faith of other believers both before and after Jesus fulfilled that which Isaac only represented. In the letter to the Hebrews, chapter eleven, we are told that the content of Abraham’s faith included the promise of the resurrection of the dead.
Hebrews 11 presents a large list of people who were saved by faith. Adam and Eve, Abel and Noah, and Abraham and Isaac are on that list. Moses is on that list. He acted as a picture of Jesus, serving as a mediator between God and God’s people. Moses proclaimed that a greater Prophet would come after him—Moses knew about Jesus. (It happens that the man who replaced Moses as leader of Israel and the man who replaced Moses as the final Mediator have the same name—Y’shua—although in English the earlier replacement is called Joshua and the ultimate replacement is called Jesus, from the Greek version of his name.)
David is also mentioned on that list. David wanted to build a Temple, a house for the Lord; but God sent the prophet Nathan to tell David that David would not build God a house—God would build David a house. His house would be the Son of David, who would rule an eternal kingdom. He would be disciplined by the Lord (bearing the burden of the world’s sin and paying in full to forgive all sinners.) David still made plans and preparations for his immediate son, Solomon, to build the Temple that David was forbidden to build. David may have been muddled in his faith, seeing either Solomon or the Temple as the fulfillment of God’s promise. Both of them were pictures of Jesus, but neither was the final fulfillment of the promise concerning the Son of David. Even so, David had saving faith in God’s promise to cleanse him from his sins and reconcile him to the Lord.
God’s means of creating, strengthening, and sustaining faith changed with the sacrifice of Jesus. From the time of Abraham to the time of Jesus, males were circumcised to initiate them into God’s chosen nation. A little blood was shed as they were brought into God’s kingdom. Even Jesus first shed blood in his circumcision. Now God’s people have Baptism, washing with water accompanied by God’s Word to initiate people into God’s chosen nation. Baptism is painless, is available to all people, and pictures the work of cleansing that is made possible by the death of Jesus on the cross. Before Jesus died on the cross, people sacrificed animals to the Lord, shedding the blood of animals as pictures of the future sacrifice. When people went through the motions of sacrifice without faith, God hated what they were doing. (See Psalm 50.) When they sacrificed in faith, God blessed their work and strengthened their faith. Now that Jesus has fulfilled the picture of sacrifice, his people no longer sacrifice animals. But they remember Jesus and his sacrifice in a sacred meal that features his body and his blood, strengthening and sustaining faith through the Word of God that accompanies that meal.
The more things change, the more they remain the same. Jesus stands at the center of all that is done by the people of God. From every tribe and language and nation—and from every time in history, from Adam and Eve to present and the future believers—we are united in the same faith in the same God and the same Savior. Abraham, Moses, David, and the other believers of Old Testament times will feast at the same heavenly banquet to which all Christians are invited, where Jesus is the host and we are all his special guests. J.