Many professing Christians struggle with assurance. Some churches even teach that it is good and healthy for believers to have uncertainty over whether or not they are saved. God, however, wants us to be assured of our salvation. This truth is made very plain to us in our text. What we see here is that assurance of salvation is obtained, not by looking at ourselves, but by looking to Christ.
The story of Jethro is primarily given to us to make this important point: All men ought to give the true God glory for his wonderful works. Even during this time of salvation history where God is dealing primarily with Israel, God’s dealings with them is intended to bring all the nations to confess that Yahweh is the true God. Every man, woman, and child ought to give God the glory due his name.
In Mary’s song, the first word in the original is magnifies. This word sets the tone for the whole Psalm. As a whole, Mary’s song teaches us the joy of Christ’s coming. Mary calls all men to join with her joy that Christ has come. So whether you are a mature saint who has believed in Christ for a long time, or a person who has never yet believed in Christ alone for salvation, what God wants from you is to rejoice in Christ this Christmas.
What do you do when you realize that God has saved you? You sing. Brothers, God’s people sing. In Gen 4, we learn that Jubal made musical instruments. Job mentions singing a handful of times. But this is the first time that singing appears canonically in the Scriptures. How appropriate that, after such a monumental event displaying God’s covenant love, that it is here that we see his people joining in song. The central point from this text for us is simply this: Sing to the LORD. But when I say that this passage urges us to sing to the LORD, I am getting after something more fundamental than mere singing. Indeed, I want us to have the heart to sing to God. My concern is that there is in each of our hearts joyful affections in Christ our Savior.