Passage
Through the tender mercy of our God; whereby the dayspring from on high hath visited us,
Through the tender mercy of our God; whereby the dayspring from on high hath visited us,
Luke 1:76 And thou, child, shalt be called the prophet of the Highest: for thou shalt go before the face of the Lord to prepare his ways;
Luke 1:77 To give knowledge of salvation unto his people by the remission of their sins,
Luke 1:78 Through the tender mercy of our God; whereby the dayspring from on high hath visited us,
Luke 1:79 To give light to them that sit in darkness and in the shadow of death, to guide our feet into the way of peace.
Luke 1:80 And the child grew, and waxed strong in spirit, and was in the deserts till the day of his shewing unto Israel.
The verse centers on "mercy", "through", "tender", "whereby", "dayspring", "high", "hath", and "visited". It is saying that the verse draws attention to "mercy" and "through", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 77's "To give knowledge of salvation unto his..." into verse 79's "To give light to them that sit...", so "mercy" and "through" 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 "mercy" and "through" with trust shaped by these words, not by a vague optimism outside the passage.