11 The first account I [1]composed , Theophilus , about all that Jesus began to do and teach , 2 until the day when He was taken up to heaven, after He had [2]by the Holy Spirit given orders to the apostles whom He had chosen . 3 To [3]these He also presented Himself alive after His suffering , by many convincing proofs , appearing to them over a period of forty days and speaking of the things concerning the kingdom of God .
Matthew Henry's Commentary on Acts 1:1-3
Commentary on Acts 1:1-5
(Read Acts 1:1-5)
Our Lord told the disciples the work they were to do. The apostles met together at Jerusalem; Christ having ordered them not to depart thence, but to wait for the pouring out of the Holy Spirit. This would be a baptism by the Holy Ghost, giving them power to work miracles, and enlightening and sanctifying their souls. This confirms the Divine promise, and encourages us to depend upon it, that we have heard it from Christ; for in Him all the promises of God are yea and amen.