It's Christmastime, which means we’re celebrating the first advent of Christ. But the fact that there’s a “first” advent implies a second, and that event—the second coming of Christ—is something all Christians should be eagerly anticipating!
Additional Resources:
Spurgeon’s exposition of Psalm 98
Matthew Henry’s Commentary on Psalm 98
A Brief History of “Joy to the World”
The Story Behind the Carol: “Joy to the World”