What happened to Jesus after the resurrection?

Why John portrays Mary as initially not recognising Jesus, even though she had known him well for a long time, is something of much debate. One theory is that, since Luke records two disciples as failing to recognise a post-death appearance of Jesus, the physical form of Jesus after resurrection must have been different, either due to the resurrection process itself, or due to the ordeal of crucifixion. More down-to-earth explanations have also been advanced, the most prominent being that Mary's tears had clouded her vision, or alternately that she is so focused on recovering Jesus' body, that she is temporarily blind to its being in front of her. However, John Calvin, and many other Christians, read this as a metaphor: that Mary's blindness despite seeing Jesus represents the blindness, according to Christians, of non-Christians who have already been informed about Jesus. Why Jesus initially encourages Mary's lack of recognition is also something of a mystery, though Dibelius, like many others, sees it as a literary conceit, since the trope of a returning hero's being unrecognised or disguised dates back at least as far as Homer's Odyssey, and Feuillet sees echoes of the Song of Solomon in this passage.