Matthew Poole and continuators on Luke 1:79

79 To give light to them that sit in darkness, and in the shadow of death, to guide our feet into the way of peace.

Here Zacharias sheweth us the end, why God visited us, with his Son, the Branch, the Light, the Day Spring, the Son of Righteousness, Men were in the darkness of Sin, and ignorance, dead in trespasses and Sins, at War and enmity with God, Christ came to give them the Light of Gospel Revelations, the Light of Spiritual comfort, and Salvation, to purchase Peace, and to direct them how to walk that they might have Peace with God, and at last enter into Peace. This he did to the Jews first, then to the Gentiles, see Isaiah 9.1, 2 & 60.1.19.