1 I wrote the former account, Theophilus, about all that Jesus began to do and teach2 until the day he was taken up to heaven, after he had given orders by the Holy Spirit to the apostles he had chosen.3 To the same apostles also, after his suffering, he presented himself alive with many convincing proofs. He was seen by them over a forty-day period and spoke about matters concerning the kingdom of God.4 While he was with them, he declared, "Do not leave Jerusalem, but wait there for what my Father promised, which you heard about from me.5 For John baptized with water, but you will be baptized with the Holy Spirit not many days from now."
- Luke, the author, explicitly links Acts to his previous work, the Gospel of Luke (Acts 1:1), addressing the same recipient, Theophilus.
- The focus shifts from what Jesus *began* to do and teach (in his earthly ministry) to what he *continues* to do through the Holy Spirit and the church.
- Jesus' post-resurrection appearances over forty days provided "convincing proofs" (Acts 1:3) of his victory over death, solidifying the apostles' faith.
- The central theme of Jesus' post-resurrection teaching was the "kingdom of God" (Acts 1:3), a concept whose understanding would be expanded beyond earthly political expectations.
- Jesus commanded the apostles to remain in Jerusalem (Acts 1:4), the historical center of God's dealings with Israel, which would become the launching point for the global mission.
- The "Father's promise" (Acts 1:4) refers to the outpouring of the Holy Spirit, foretold in the Old Testament (e.g., Joel 2:28-29, Isaiah 44:3) and promised by Jesus (John 14:16-17, 26; 15:26; 16:7).
- Jesus contrasts John's water baptism with the imminent baptism "with the Holy Spirit" (Acts 1:5), signifying a new era of empowerment and divine indwelling for believers.
- The phrase "taken up" (Acts 1:2) anticipates the detailed description of the Ascension later in the chapter.