I think, therefore iambic pentameter

Christmas comes suddenly, whether we're ready or not.
The long waiting and anticipation is over.
In an instant, the water will freeze into place, whether or not we are ready with the lamps to transform the wild wastes into a wonderland.

Christmas comes suddenly, in the midst of all the busy fullness, and we scramble about just to sweep out a stall, gather a few fresh blankets. There is never enough room, but Christmas comes anyway, and for all the anticipation, its gift always comes as a surprise.

May Christmas come to you with its swift and long-expected gladness, making you suddenly ready.