The birth of any child is an occasion for joy, but the birth of God's Holy Child was the beginning of the fulfillment of all our expectations. God promised the returning exiles they would see His glory at work among the nations. God would take the initiative to lead the nations to serve Him. God's people need to recognize God's initiative, reflect His shining glory, and accept those God leads to them. Joy is the result.
Evangelism takes advantage of opportunities to reach internationals and rejoices in the results.
Because He loves His people. Because He is the sovereign ruler of the world, we can be sure He will carry out His plan. 2 See, darkness covers the earth and thick darkness is over the peoples, but the Lord rises upon you and His glory appears over you. 3 Nations will come to your light, and kings to the brightness of your dawn. 6 Herds of camels will cover your land, young camels of Midian and Ephah.