All good romantic comedies end with a wedding. The story of the cosmos is no exception. (Though it is unusual in that the wedding feast is eternal.)
The Crucifixion and Resurrection are the Hero's final victory, in which He defeats His rival and wins the hand of His Bride. (And what she ever saw in the rival I'll never know*.)
We are now in the time between the betrothal and the wedding. The Groom has given us a job: Get ready for the celebration!
There's a lot to do -- we need to pass out the invitations, and set up the tables, and make sure we've got enough oil for the lamps. But the Groom is doing all the hard work. He writes the invitations, provides the tables, pays for the oil.
The Groom's Father has even sent a Wedding Planner to make sure everything goes right. Best if we listen to the Planner, but either way He will see to it that what the Father wants for His Son's wedding, the Father gets.
And the Groom well knows that setting up for a party is thirsty work, so He's provided Wine (and Bread, too) for us to refresh ourselves as needed. No fear of running out, either.
All for the party when the Groom and His Bride begin to live happily ever after.
*. Clio has a multi-post look at "bad boys" (starting here) that may shed some light on the fascination.