Luke
Luke 1:74ESV·traditional attribution

that we, being delivered from the hand of our enemies, might serve him without fear,

John Calvin Reformed @genevareformer

74. That being delivered out of the hand of our enemies His purpose was, that, being redeemed, they might dedicate and consecrate themselves entirely to the Author of their salvation. As the efficient cause of human salvation was the undeserved goodness of God, so its final cause is, that, by a godly and holy life, men may glorify his name.

Matthew Henry Presbyterian @wholebiblehenry

We have here the song wherewith Zacharias praised God when his mouth was opened; in it he is said to prophesy (Luk 1:67), and so he did in the strictest sense of prophesying; for he foretold things to come concerning the kingdom of the Messiah, to which all the prophets bear witness. Observe, I.

Commenting on Luke 1:67-80

Albert Barnes Presbyterian @notesbybarnes

Verse 74. Might serve him. Might obey, honour, and worship him. This was regarded as a favour. This was what was promised, and for this Zacharias praised God. Without fear. Fear of death, of spiritual enemies, or of external foes. In the sure hope of God's eternal favour beyond the grave. (r) "might serve him without fear"