One of the reasons that Beethoven is known as a great (perhaps the greatest!) composer alive was because he was a master at building his music to climactic moments. If you listen to him, he will build and build and build to a point at which you are certain, certain! that he has reached the climactic moment of the movement, then he promptly throws a curveball at you (could he throw curveballs?) and he goes back to building, building, building, until when Beethoven is good and ready he delivers the climactic moment of the particular movement he is in.
This is what John does in the great prologue to his gospel. He starts with “In the beginning was the Word” (“Is this the climactic moment?” “No grasshopper”). John was the witness of Jesus Christ who was the True Light that came into the world (“Is this it, Poppa?” “Be patient little grasshopper”). To all who did receive him he gave the right… (Surely this must be it?” “Not yet”).
And the Word became flesh and dwelt among us (“Yes! This is it, little one”). John masterfully builds and builds the prologue to this majestic truth which is the capstone of the prologue, indeed, the capstone of the whole book. By all rights, this is the capstone of all of history: The Word became flesh and dwelt among us.