Passage
the oath which he swore to Abraham, our father,
the oath which he swore to Abraham, our father,
Luke 1:71 salvation from our enemies, and from the hand of all who hate us;
Luke 1:72 to show mercy towards our fathers, to remember his holy covenant,
Luke 1:73 the oath which he swore to Abraham, our father,
Luke 1:74 to grant to us that we, being delivered out of the hand of our enemies, should serve him without fear,
Luke 1:75 In holiness and righteousness before him all the days of our life.
The verse centers on "oath", "swore", "abraham", and "father". It is saying that the verse draws attention to "oath" and "swore", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 72's "to show mercy towards our fathers to..." into verse 74's "to grant to us that we being...", so "oath" and "swore" belong inside that flow. In Luke context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "oath" and "swore" with trust shaped by these words, not by a vague optimism outside the passage.