“Behold, the days are coming, declares the Lord, when I will make a new covenant with the house of Israel and the house of Judah” (Jeremiah 31:31—read Jeremiah 31:31-34).

God’s love is more important to him than his justice. God has justice and righteousness, but God is love. His grace is greater than his law. He prefers rescuing sinners rather than punishing them.

Therefore, God’s new covenant is older than his old covenant. The old covenant comes first to diagnose our need for a Savior, but the new covenant was in God’s mind when he began to create the world. God knew that his people would sin. He knew they would need a Savior, because they would not be able to rescue themselves from sin and evil. He knew that he would have to pay the full price to redeem sinners. Knowing these things, God chose to create the world and chose to continue his plan of redemption.

So, God gave the old covenant to his chosen people. He said, “I will be your God, and you will be my people.” He told them what it meant to be his people: to have no other gods; to honor his name and his time and the earthly authorities that represent his authority; to love their neighbors and respect their neighbors’ lives, marriages, property, and reputations; and to be content with what God provided them, not coveting what belonged to their neighbors. He said that if they kept their side of the covenant, he would provide them with safety and prosperity. If they broke the terms of the old covenant, he would cause famine and drought and poverty, and he would allow them to fall into the hands of their enemies.

The old covenant is conditional. The new covenant is unconditional. Because his people broke the terms of the old covenant, he allowed them to be afflicted by drought and famine. He allowed them to be afflicted by Midianites and Philistines and Assyrians and Babylonians. He allowed them to be captured and carried off into captivity. Even the holy city Jerusalem and the Temple of the Lord were destroyed under the terms of the old covenant because his chosen people were unfaithful to the Lord.

At the same time that they preached about the old covenant and the consequences of breaking God’s commands, Moses and the prophets also spoke of a new covenant. Moses prepared the people for a king and priest and prophet. Isaiah repeatedly told of the coming servant who would be Immanuel, God with us. Jeremiah specifically promised a new covenant that would be different from the old covenant, because it would be based on God’s faithfulness and not on the faithfulness of the people.

“I will be their God, and they will be my people,” God said. Those words belong to both the old covenant and the new covenant. Under the terms of the old covenant, the thoughts and words and actions of the people determined whether they remained God’s people. Under the terms of the new covenant, the thoughts and words and actions of God determine whether we remain God’s people.

Old Testament believers were saved by faith through grace under the terms of the new covenant. They believed the promise of a coming Savior. New Testament believers are saved by grace through faith under the terms of the new covenant. We believe that the Savior has come—he is Christ, the Lord—and he has kept all the promises upon which the new covenant depends. He has lived a life of perfect righteousness, earning rewards which he shares with his people. He has offered that life as a sacrifice, removing the sins of his people. He has risen from the dead, victorious over all enemies, sharing that victory with his people.

“For I will forgive their iniquity, and I will remember their sin no more.” God knows everything, but he is able to forget. Between his birth and his resurrection, Jesus forgot the date of his glorious appearing on the Day of the Lord. God has forgotten the iniquity of his people because Jesus paid in full for those sins. God has forgotten the iniquity of his people because our sins were killed with him on the cross, buried with him, and left dead and buried when Jesus rose from the dead. God has forgotten the iniquity of his people because he has removed our sins from us “as far as the east is from the west.” We belong to him forever. Thanks be to God! J.

“Arise, shine, for your light has come, and the glory of the Lord has risen upon you” (Isaiah 60:1—read Isaiah 60:1-7).

The contrast of light and darkness is one of the great recurring themes of the Bible. The first thing God created when he made the heavens and the earth was light, and then God separated the light from the darkness. John begins his Gospel writing about the Word, who is the light and the life of all people. The light shines in the darkness, and the darkness has not overtaken it. Isaiah said that the people sitting in darkness have seen a great light. Both Isaiah and Simeon called Jesus a light to enlighten the nations. Now Isaiah calls upon God’s people to arise and shine, because our light has come and the glory of the Lord has risen upon us.

Jesus told his disciples that they are the lights of the world. Jesus also declared himself to be the Light of the world. He is the primary light; his disciples are secondary lights. He shines like the sun; we shine like windows through whom the sun shines. When Jesus shines through us, his light enlightens others. As we share his promises and the good news of his victory over evil, we do our job as windows, letting his light shine into the lives of others.

Without Jesus we cannot shine. His light comes first and passes through us. Along the way, his commandments reveal our flaws and our faults. When someone washes the windows on a cloudy day, the streaks and smears might not be visible. When the sunlight shines brightly on that window, every missed spot and every speck of dirt can be seen.

We might not want Jesus to shine on us and show our sins. But the light of Jesus does something that sunlight never does to windows: his light removes the dirt and makes us pure and holy. When his light shines through us, we become clean; and because of that cleansing, the light is all the more able to shine through us to enlighten others.

Isaiah pursues that theme as he describes the nations coming to the light of Israel. Isaiah even mentions the nations bringing gifts of gold and frankincense. The wise men who followed a star to find Jesus in Bethlehem were the first of the nations to seek the light in Israel. Centurions in the Roman army also sought help from Jesus during his years of ministry, and one came into the Church early in its history through Peter’s ministry. An Ethiopian official was told about Jesus and was baptized by the deacon Philip. Paul preached to Jews and to the nations, to whomever would listen, and over the course of three hundred years the Roman Empire became a Christian nation. Now the Gospel continues to be spread throughout the world. As missionaries teach about Jesus, people hear and believe and are saved: God’s kingdom comes, and God’s will is done. Thanks be to God! J.