But when Silas and Timothy arrived from Macedonia [i.e., from the town of Berea], Paul began devoting his full time to declaring the message to Jews that Jesus was the Christ.
[Then, at the hands of the Roman authorities] you killed the Prince of [never ending] life, but God raised Him from the dead, and we [apostles] were [reliable] witnesses of it.
But, you apostles will receive power when the Holy Spirit descends on you and [then] you will become My witnesses [i.e., to tell what you know] in Jerusalem, in [the countries of] Judea and Samaria, and [even] to the distant regions of the earth.”
And they [i.e., the apostles] were all filled with [the power of] the Holy Spirit and began to speak [“the mighty accomplishments of God,” See verse 11] in different languages, as the Holy Spirit gave them the ability.
from His immersion by John [the Immerser] until He was received up from us [in a cloud]. Of these people [we must choose] someone to become a witness with us [i.e., to tell people] of Jesus' resurrection [from the dead].”