Christ, and Christ alone, brings joy. People seek for happiness in the widest possible ways, but Jesus is the sole source of joy.
I was recently in an officially atheistic country and was, frankly, surprised to see the Christmas decorations – not in the homes of believers, but in the businesses in the city. Years ago I was in an officially Muslim country and the retail stores in the cities looked like Macy’s on Thanksgiving. People are happy to use Christmas to make their sales. More customers bring more money, and that makes people happy.
The believers in Muslim countries and in atheistic countries know the joy that comes from Him who came to bring us life, no matter what their external circumstances. They rejoice in their Savior.
Joy to the world! The Lord is come!