‘So then the Lord Jesus, after he had spoken to them, was received up into heaven, and sat down at the right hand of God.'
‘The Lord Jesus.' A fitting final declaration that Jesus was now ‘the Lord'. He was made both Lord and Messiah (Acts 2:36), given the name that is above every name (Philippians 2:9). It is a fitting end to the Gospel. It was what Mark has been pointing to all the way through. Jesus is now ‘the Lord'.
‘Received up into heaven.' This would seem to be an indication that Jesus' final appearance to His disciples had taken place (Luke 24:51; Acts 1:9). He Whom earth has rejected and would not receive is welcomed in heaven and given His rightful place.
‘Sat down at the right hand of God.' Just as He had declared would be the case at His trial (Mark 14:62; Psalms 110:1). He receives the Kingship as the Son of Man, and is declared both Lord and Messiah (Acts 2:36). All authority had been given to Him in heave and on earth (Matthew 28:19).