4 Once when he was eating with them, he commanded them, "Do not leave Jerusalem until the Father sends you the gift he promised, as I told you before. 5 John baptized with water, but in just a few days you will be baptized with the Holy Spirit."
6 So when the apostles were with Jesus, they kept asking him, "Lord, has the time come for you to free Israel and restore our kingdom?" 7 He replied, "The Father alone has the authority to set those dates and times, and they are not for you to know. 8 But you will receive power when the Holy Spirit comes upon you. And you will be my witnesses, telling people about me everywhere-in Jerusalem, throughout Judea, in Samaria, and to the ends of the earth." 9 After saying this, he was taken up into a cloud while they were watching, and they could no longer see him. 10 As they strained to see him rising into heaven, two white-robed men suddenly stood among them. 11 "Men of Galilee," they said, "why are you standing here staring into heaven? Jesus has been taken from you into heaven, but someday he will return from heaven in the same way you saw him go!"
Matthew Henry's Commentary on Acts 1:4-11
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.
Commentary on Acts 1:6-11
(Read Acts 1:6-11)
They were earnest in asking about that which their Master never had directed or encouraged them to seek. Our Lord knew that his ascension and the teaching of the Holy Spirit would soon end these expectations, and therefore only gave them a rebuke; but it is a caution to his church in all ages, to take heed of a desire of forbidden knowledge. He had given his disciples instructions for the discharge of their duty, both before his death and since his resurrection, and this knowledge is enough for a Christian. It is enough that He has engaged to give believers strength equal to their trials and services; that under the influence of the Holy Spirit they may, in one way or other, be witnesses for Christ on earth, while in heaven he manages their concerns with perfect wisdom, truth, and love. When we stand gazing and trifling, the thoughts of our Master's second coming should quicken and awaken us: when we stand gazing and trembling, they should comfort and encourage us. May our expectation of it be stedfast and joyful, giving diligence to be found of him blameless.