But the point is completely serious: Jesus, our great High Priest, sacrificed himself for us on the cross, so that the sacrifices for sin in the Old Law are now complete and never need to be repeated. His work done, he was exalted on high and sat down. And now, at the throne of God, he intercedes for us.
The Apostle Paul was into the Ascension, when you come to think of it. I'm writing this post on the fly, so I'll let y'all look up the passages, which I'm also going to quote (mostly) from memory:
"Wherefore God also hath highly exalted him, and given him a name that is above every name..."
"When he ascended on high, he led captivity captive and gave gifts unto men...And he gave some apostles, some prophets...for the perfecting of the saints for the work of the ministry."
"It is Christ that died, yea rather that is risen again, who is even at the right hand of God, who also maketh intercession for us."
And the collect today recalls "Set your affections on things above, not on things on this earth."
Grant, we beseech thee, Almighty God, that like as we do believe thy only begotten Son our Lord Jesus Christ to have ascended into the heavens; so we may also in heart and mind thither ascend, and with him continually dwell, who liveth and reigneth with thee and the Holy Ghost, one God, world without end. Amen.