This Message shows that the work of Christ on earth concluded in His ascension. He had completed His work, but He commissioned and equipped His disciples to continue the work, with the glorious certainty that when the Work is complete He will return for His people and they will live forever with Him.
11 and said, “Men of Galilee, why do you stand looking into heaven? This Jesus, who was taken up from you into heaven, will come in the same way as you saw him go into heaven.”
Acts 1:11 English Standard Version (ESV)