XKCD Isn't Funny - #1575 - Footprints
I'm torn on this one. One half of me says that a graph is the best way to tell this joke, because the joke is specifically in reference to alterations in a number, and it would get tedious to have every panel captioned with "Sets of footprints: [X]". The other half of me says that no, that way would be totally fine, and we're missing a great visual gag seeing your Lord being carried by some schlub.
I consulted my good friend, Lightning, and he says, yes, the graph/text thing is straightforward and easy to understand. He also points out that the "Jesus disappeared..." gag wouldn't work since the reader would see the same panel five times and get bored.
My favorite part of the comic is the end: "Went home", which brings to mind the image of Jesus and Friend having gone on this epic adventure thing. Like Lamb, only good.