Passage
Then Peter, filled with [the] Holy Spirit, said to them, Rulers of the people and elders [of Israel],
Then Peter, filled with [the] Holy Spirit, said to them, Rulers of the people and elders [of Israel],
Acts 4:6 and Annas the high priest, and Caiaphas, and John, and Alexander, and as many as were of [the] high priestly family;
Acts 4:7 and having placed them in the midst they inquired, In what power or in what name have *ye* done this?
Acts 4:8 Then Peter, filled with [the] Holy Spirit, said to them, Rulers of the people and elders [of Israel],
Acts 4:9 if *we* this day are called upon to answer as to the good deed [done] to the infirm man, how *he* has been healed,
Acts 4:10 be it known to you all, and to all the people of Israel, that in the name of Jesus Christ the Nazaraean, whom *ye* have crucified, whom God has raised from among [the] dead, by *him* this [man] stands here before you sound [in body].
The verse centers on "Spirit", "peter", "filled", "holy", "said", "rulers", "people", and "elders". It is saying that the verse draws attention to "Spirit" and "peter", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 7's "and having placed them in the midst..." into verse 9's "if we this day are called upon...", so "Spirit" and "peter" belong inside that flow. In Acts context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "Spirit" and "peter" with trust shaped by these words, not by a vague optimism outside the passage.