Whereby the dayspring ... - The word “dayspring” means the morning light, the aurora, the rising of the sun. It is called the dayspring “from on high” because the light of the gospel shines forth from heaven. God is its Author, and through His mercy it shines upon people. There is here, doubtless, a reference to Isaiah 60:1-2; indeed, almost the very words of that place are quoted. Compare also Revelation 22:16.
Related Commentaries of Luke 1:78
Luke 1:78
78 Through the tenderd mercy of our God; whereby the dayspring from on high hath visited us,