No one has ascended into heaven except he who descended from heaven, the Son of Man. --John 3:13
We did not ascend into heaven, but He is the one who descended and ascended and remained above. Now what are we to do? Must we despair?
No, for He shows us the way to ascend. He explains why He came into the world and how he constructed a good, firm, and solid bridge for us to ascend safely into heaven. He Himself is this Bridge.
--Luther, preaching on John 3:13, in LW 22:331