Epiphany is the celebration of the revelation given to us that Jesus Christ is Lord of all the earth – Jews and Gentiles. This is at the heart of the good news of Jesus Christ.
For all the gospel writers: Matthew, Mark, Luke and John, and for the early Church, John the Baptist was the start of this ‘good news’ of Jesus, which is of course what the word ‘gospel’ means.
So John the Baptist is the beginning of the Good News of Jesus Christ. He begins by prophesying that the Kingdom of Heaven has come near. The phrase Kingdom of God or Kingdom of heaven is itself an Old Testament phrase used to describe the breaking in of God’s kingly rule into the world.