Joy is a response to the reign of King Jesus. It is the rule of Christ and not your circumstances that is your reason for joy. This is the theme of the second verse of Joy to the World:
Joy to the World, the Savior reigns!
Let men their songs employ;
While fields and floods, rocks, hills and plains
Repeat the sounding joy.
God has done marvelous things. It is true that there is much darkness and sadness in our world, but because of the Lordship of Christ, you have hope. Things are not as they appear to be. Regardless of what the circumstances appear to declare, this one fact remains – the Savior reigns! There is more to life than meets the eye. God is faithful to his covenant promises.
Joy to the world, the Savior reigns! This is truth is a blessing to give to your children. When things are going well we can have joy. But more importantly, when things do not appear to be going well, it is a blessing to sing, even with tears, Joy to the world, the Savior reigns!
Psalm 2 offers the perfect response and warning to the reign of Christ. Those who reject the authority of Christ and fail to bow to him will face his anger. But those who take refuge in him will find everlasting joy!
Therefore, you kings, be wise;
be warned, you rulers of the earth.
Serve the Lord with fear
and celebrate his rule with trembling.
Kiss his son, or he will be angry
and your way will lead to your destruction,
for his wrath can flare up in a moment.
Blessed are all who take refuge in him.