Matthew Poole and continuators on Luke 1:75

75 In holiness and righteousness before him, all the days of our life.

Thus Zacharias by an infallible Spirit, expounds the Covenants, and Oaths of God to Abraham, and David, not as they appear to us at first view, as if they were promises of a meer temporal Kingdom, and a Victory for the Jews over their Enemies, together with a splendid state for them; which was all the Scribes and Pharisees, and the generality of the Jews expected from the Messiah, but as confirming Gods resolution to send the Jews a Saviour, who should save them from their Sins, the guilt and Dominion of them, and from the Power of Hell, and purchase a spiritual liberty for them to serve the Lord all their days, without fear in holiness, and righteousness, which indeed, was the true end of the Messiahs coming. Thus far now the Song of this holy Man respected Christ, whom he sheweth to be sent from the free Grace, and Mercy of God, yet in performance of Gods truth and faithfulness, according to his Oath, and promises, and to be therefore sent to deliver his People from their Enemies, and to purchase for them a spiritual liberty not to Sin, but to serve the Lord without fear, in Holiness and Righteousness. The latter part of his Prophecy, respecteth Iohn the Baptist, the new born Son of this Priest, and heavenly Prophet.