God used visions and dreams

Visions in the New Testament also served to provide information that was unavailable elsewhere. Specifically, God used visions and dreams to identify Jesus and to establish His church. Zacharias (Luke 1:5-23): God used a vision to tell Zacharias, an old priest, that he would soon have an important son. Not long after, Zacharias and his wife, Elizabeth, had John the Baptist. 

 Joseph (Matthew 1:20; 2:13): Joseph would have divorced Mary when he found out she was pregnant, but God sent an angel to him in a dream, convincing him that the pregnancy was of God. Joseph went ahead with the marriage. After Jesus was born, God sent two more dreams, one to tell Joseph to take his family to Egypt so Herod could not kill Jesus and another to tell him Herod was dead and that he could return home. Pilate's wife (Matthew 27:19): During Jesus’ trial, Pilate’s wife sent an urgent message to the governor encouraging him to free Jesus. Her message was prompted by a dream she had—a nightmare, really—that convinced her that Jesus was innocent and that Pilate should have nothing to do with His case. 

 Ananias (Acts 9:10): It would have taken nothing less than a vision from God to convince Ananias, a Christian in Damascus, to visit Paul, the persecutor of Christians. But because Ananias was obedient to God's leading, Paul regained his sight and found the truth about those he was trying to kill. Cornelius (Acts 10:1-6): God spoke to an Italian centurion named Cornelius who feared the God of the Jews. In his vision, Cornelius saw an angel who told him where to find Simon Peter and to send for him and listen to his message. Cornelius obeyed the vision, Peter came and preached, and Cornelius and his household full of Gentiles were saved by the grace of God. Peter (Acts 10:9-15): While Peter was praying on the rooftop of a house in Joppa, God gave him a vision of animals lowered in something like a sheet. A voice from heaven told Peter to kill the animals  some of which were unclean) and eat them. The vision served to show that Christians are not bound by kosher law and that God had pronounced Gentiles “clean”; that is, heaven is open to all who follow Jesus. Paul: Paul had several visions in his missionary career. One sent him to preach in Macedonia (Acts 16:9-10). Another encouraged him to keep preaching in Corinth (Acts 18:9-11). God also gave him a vision of heaven (2 Corinthians 12:1-6). John (Revelation): Nearly the entire book of Revelation is a vision John had while exiled on the island of Patmos. John’s vision explains in more detail some of the events that God had shown Daniel. Today’s Dreams and Visions With the completion of the Bible, God does not have to use dreams and visions as much as He did before. That is not to say that He cannot or does not; God can communicate with us however He chooses. But when we have a decision to make, our first stop should always be the Bible, not a dream.