The opening verse of Mark's Gospel is more than a preface or title. It offers an interpretation of the book and its theological message.
Because it has no main verb, the opening verse of the Gospel of Mark does not compose a sentence, but expresses a way into the entire Gospel. The verse addresses the reader with an interpretive introduction, saying that any event in the life of Jesus--his teachings, his miracles, his parables, or any story--expresses that "the beginning of the good news of Jesus Christ, the Son of God" (1:1) has broken into our world.
The Gospel According to
The Proclamation of John the Baptist
1The beginning of the good news* of Jesus Christ, the Son of God.*