How can Christians properly celebrate Christmas today? Certainly, Christmas trees, gift-giving, family reunions, and many other customs can all be joyful traditions of the season. But Spurgeon would say that the primary way to celebrate Christmas is by faith in the incarnate, crucified, and risen Savior. That's why A Wondrous Mystery exists: amid a busy holiday season, it is meant to be a daily reminder of why we celebrate--that "the Infinite has become an infant" and "the joy of his coming is still in our hearts."