John 1:6-9 WEB
There came a man, sent from God, whose name was John.  The same came as a witness, that he might testify about the light, that all might believe through him.  He was not the light, but was sent that he might testify about the light.  The true light that enlightens everyone was coming into the world.
John the prophet was commissioned by God to announce the coming of Christ (Mark 1:2). This is not the same John who wrote the Book of John. This is John the Baptist who is also called the Forerunner of Christ, or Elijah who is to come (Luke 1:17). John was called baptist because he preached repentance followed by baptism (Mark 1:4).
It’s interesting, the testimony of Christ was a message of repentance (Acts 19:4). John spoke to the general public but often he aimed his comments at religious and political leaders. And, not just any religious leaders, but the Pharisees (Mt 3:7). That is significant because the Pharisees were the godliest people in the land.
If the godliest people of the day could not discern Christ (John 12:42), how can we be sure we do not miss Christ? It’s important we understand the first announcement of the coming of Christ (Gen 3:15, Luke 1:31). We’re at a time when we all expect the millennial reign to come at any moment, so it seems pertinent we can recognize when somebody is announcing Christ.
Lord Jesus, please help me recognize the signs of your second coming. In Jesus’ name, I pray, amen.