Church is a Greek word meaning “The Lord’s House.”
The church was established in the book of Acts of the Apostles. No other place in the Bible will you find the complete plan of salvation. Matthew, Mark, Luke and John, (also called the gospel, meaning good news), were written about the life and miracles of Jesus. They tell of the deity of Jesus.
Romans through Jude are, for the most part, letters written to churches that were already established in the book of Acts. These letters were for instructions to help with specific problems and encouragement to those churches. They were maintenance manuals written to those churches. No book in the New Testament has the complete plan of Salvation except the book of Acts. The other books from Romans through Jude are like owners manuals. Your automobile owners manual when you look up how to change a flat will tell you only how to change the flat. They do not tell you how the automobile was made. The manufacturer assumes that you have the automobile, otherwise you would not need to know how to change a flat.
The original church was persecuted during the early years of the church. Saul of Tarsus was one of the most aggressive of these men persecuting the early Christians. The Jewish Priest and leaders of the establishment, had been the ones that had caused the death of Jesus. He had royally messed up their play house. He had called them vipers, hypocrites and called on them to repent. Told them that the Kingdom of God was at hand. After the death, burial and resurrection of Jesus these religious leaders had a much greater problem. After the day of Pentecost those followers of Jesus went everywhere preaching the Gospel. They were called Christians first at Antioch, (Acts 11:26). The more they were persecuted the more the Gospel was spread.
Saul was on his way to Damascus with orders from the High Priest to kill the Christians. Saul was knocked down and blinded by a great light on the road to Damascus. Saul asked the question, (9th chapter of Acts), “Who art thou Lord? The Lord answered saying, “I am Jesus, whom thou persecutest.”
After the conversion of Saul, Jesus changed his name to Paul. The apostle Paul wrote more books of the Bible than any other person.
The beginning of the Christian Church is dated from the great day on which the Holy Ghost came down, according as our Lord had promised to His Apostles. At that time, "Jews, devout men, out of every nation under heaven," were gathered together at Jerusalem, to keep the Feast of Pentecost (or Feast of Weeks). Pentecost means 50. This second of the three Great Feasts commanded to be kept was 50 days after the first Great Feast. The first Great Feast was to celebrate the Passover. The Passover was the night when the death angel passed over Egypt and killed all of the first born who did not have the blood applied to the door post of their house. Jesus was slain during the celebration of the Passover. He is the blood for the atonement for sin. The second Great Feast celebrated the Giving of The Law to Moses on Mount Sinai. The Law was given to Moses amidst a noise, as the sound of a great trumpet, there was fire, lightening and thunder. The mountain melted and ran down. God was getting their attention!
The giving of the law on Mount Sinai was called the First Covenant. This event was one of the three holy seasons at which God required His people to appear before Him in the place which He had chosen (Deuteronomy 16:16).