Passage
The first book I wrote, Theophilus, concerned all that Jesus began both to do and to teach,
The first book I wrote, Theophilus, concerned all that Jesus began both to do and to teach,
Acts 1:1 The first book I wrote, Theophilus, concerned all that Jesus began both to do and to teach,
Acts 1:2 until the day in which he was received up, after he had given commandment through the Holy Spirit to the apostles whom he had chosen.
Acts 1:3 To these he also showed himself alive after he suffered, by many proofs, appearing to them over a period of forty days, and speaking about God’s Kingdom.
The verse centers on "first", "book", "wrote", "theophilus", "concerned", "jesus", "began", and "both". It is saying that the verse draws attention to "first" and "book", so its meaning should be read from those terms before moving to application.
The next verse adds "until the day in which he was...", so "first" and "book" should be read forward into that movement. In Acts context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "first" and "book" with trust shaped by these words, not by a vague optimism outside the passage.