My name is Daniel Ostrowski, and I was sitting in a hospital waiting room in Kraków when I first copied Luke 1:77 NASB into the notes app on my phone. My father was in surgery. I had a small travel Bible with me and had opened it at random, which is the kind of thing you do when you are frightened and out of other ideas. The verse stopped me: “To give to His people the knowledge of salvation by the forgiveness of their sins.” Fourteen words. I read it four times before I understood why it was landing so hard.

That was three years ago. I have spent a fair amount of time with that verse since then.

The Context You Need Before the Words Make Sense

Luke 1:77 is part of a longer poem called the Benedictus, spoken by a priest named Zechariah. To understand why the verse matters, you have to understand who is saying it and when.

Zechariah had been mute for nine months. An angel had appeared to him in the temple and told him his elderly wife Elizabeth would bear a son who would prepare the way for the coming of the Lord. Zechariah doubted out loud, and his voice was taken from him until the prophecy came true. Then John is born, and Zechariah’s first words in nine months are this song. That is the frame.

[Link: overview of Zechariah and Elizabeth in the Gospel of Luke]

The Benedictus runs from verse 68 to verse 79. Verse 77 sits near the end of the poem, in the section where Zechariah is addressing his newborn son directly. He is describing what John’s life will be for: to go before the Lord, to prepare His ways, and specifically to give His people the knowledge of salvation through the forgiveness of sins.

What the NASB Translation Reveals

Different translations pull out different threads. The New American Standard Bible renders this verse cleanly: “To give to His people the knowledge of salvation by the forgiveness of their sins.”

The phrase “knowledge of salvation” is worth sitting with. The Greek word here is gnosis, which in other contexts carries weight. This is not a vague awareness that things will be okay. Zechariah is speaking about something that can be known, understood, held. Salvation is presented as something with content.

The phrase “by the forgiveness of their sins” tells us the mechanism. This is how salvation becomes knowable: through forgiveness. Not through achievement or moral improvement or religious precision, but through the removal of what separates. The NASB’s use of “by” is a reasonable translation of the Greek en, which can indicate instrument or means. Forgiveness is the vehicle through which knowledge of salvation travels.

[Link: how the NASB translates key theological terms in Luke]

Compare this with how earlier in the same song Zechariah speaks about a “horn of salvation” raised up in the house of David (verse 69) and about the covenant with Abraham (verse 72). The Benedictus is operating on multiple registers at once: personal, national, cosmic. Verse 77 is the pivot point where all of that theological weight gets translated into something a human being can actually receive.

Why John’s Role Is Specific

There is something careful in how Zechariah frames his son’s calling. John is not the salvation. He is the one who will give people the knowledge of it. The distinction matters.

In the structure of Luke’s Gospel, this verse works as a preview. John will later appear in the wilderness calling people to a baptism of repentance for forgiveness of sins (Luke 3:3), and he will explicitly say that one more powerful than he is coming. His function is preparatory. He opens a door he will not walk through himself, or at least not in the way those who come after him will.

For a parent to look at a newborn child and speak this clearly about what that child exists to do is striking under any reading. Zechariah had months of silence to think. The words that broke that silence are not relief or personal joy, though those things are present too. They are theology. They are meaning assigned to a life before that life has had a chance to do anything.

[Link: parallel between John the Baptist’s mission in Luke and in the Gospel of John]

The Phrase That Kept Me in That Waiting Room

What caught me in that hospital in Kraków was the word “knowledge.” Not hope of salvation, not promise of salvation. Knowledge.

My father is not a religious man. He would describe himself as a lapsed Catholic with strong opinions about church architecture and little patience for homilies. We had never talked seriously about any of this. When he came out of surgery successfully and I went in to see him, I did not quote the verse at him. That is not how either of us works.

But I kept thinking about what it would mean to actually know something rather than hope for it. Zechariah is describing John’s ministry as one that delivers knowledge. Something you can hold, test, examine. The forgiveness of sins as epistemically solid ground.

The Difference Between Hope and Knowledge

Christian theology has a long tradition of distinguishing between different kinds of knowing. Augustine writes about the restlessness of the heart. Thomas Aquinas distinguishes between faith and sight. Luther, in his preface to Romans, talks about a living, busy, active thing that cannot help but do good.

What Zechariah is gesturing at in Luke 1:77 is closer to what the New Testament elsewhere calls assurance. The knowledge that forgiveness has occurred, that the ledger has been addressed, that the thing standing between a person and God has been dealt with. Not as future hope only, but as present reality available for the knowing.

That is a significant pastoral claim. And John, in Zechariah’s vision of him, exists to deliver it.

[Link: how the concept of forgiveness develops across Luke-Acts]

Reading the Verse Alongside Luke 1:78-79

You cannot fully read verse 77 without continuing into the next two verses, which complete the thought. Zechariah moves