In the beginning, God created man. When he was created, he was pure and holy. He was created for a purpose. God, the one true sovereign and benevolent being, created man in order to give of His loving nature. But man was deceived by evil and fell into sin. This sin affected man and all of his offspring to the point that he was no longer able to serve God as he was created to. He hated God by nature. . .
But God did not abandon man. Nor did He abandon all the hopes and plans that He had for man. Instead, He made a promise. This promise involved a covenant to redeem man from his fall into sin and restore him to the dignity and hopes that He had originally desired. He told Eve (the first woman) that, despite the fall, He would send One who would crush the head of the serpent, even as the serpent crushed his heel (Gen. 3:15). This promise was to send a Redeemer who would, essentially, clean up the mess by undoing what they had done.
In order to accomplish this, many years later, He made another promise to an idol worshiper named Abraham. He promised Abraham that he was going to bless the world through him. He said that kings and rulers would come from him. Most importantly, He said that the Redeemer would come through his line. Through Abraham, God created a nation and called it Israel. To this nation, God made a covenant to be their God and to spread His Word through them. They were the entrusted vessels of God’s message. Through the nation of Israel, God further confirmed and extended His promise through a young shepherd boy named David. To David, God gave the kingdom of Israel. He also covenanted to send the Redeemer through David’s line.
In spite of the rebellion and constant betrayal of His chosen people, Israel, God covenanted yet again, and, again, further extended the blessing that began in the Garden. This time He said that He was going to change people’s hearts by making them become more like Him. In His words, “I will write my law upon their heart and I will be their God” (Jer. 31:31-33).
Five hundred years later, God sent the One whom He had covenanted to send, and this One, as it turned out, was His own Son. He was both everything that God is and everything that man was, yet without sin. To the dismay of many, He did not set up the Kingdom as they thought He came to do, but He first set up a Kingdom in the hearts of His people by dying on a cross and purchasing their redemption from sin and betrayal. After His death, He rose again, showing that the redemption was accomplished. He undid what Adam had done.
After His resurrection, He sent the Holy Spirit, the third Person of the Trinity, who is also everything that God is, to indwell all those who believed and followed the Redeemer, so that they would have power to spread the message of redemption. He entrusted to them the Gospel message, as it came to be known, and called them the Church.
The Church, made up of both Jews and Gentiles, is now the bearer of the Good News of God’s covenanted redemption. They are His representatives here on the earth. God the Son told the Church to tell others about Him until He comes back. When He comes back, He will then set up His Kingdom and destroy all evil and death, the final foe. The Church now eagerly awaits His coming, as they fight for the Kingdom.