Then Jesus said to him, “Truly, truly, I tell you, you will see heaven opened up and the angels of God going up [from] and coming down on the Son of man” [i.e., probably a reference to angels ministering to Jesus’ needs. See Matt. 4:6, 11; Luke 22:43].
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].”