1980

Apart from the extraneous caption, this is not terrible! While redolent of GOOMH-bait, there's a recognizable joke here, with a setup and punchline. I could maybe complain that Turkish delight is only a plot point in The Lion, the Witch, and the Wardrobe, so it's inaccurate to say "the Narnia books", but I can hardly bring myself to be so cruel. So mark your calendars, dear readers: on April 13, 2018, XKCD didn't suck.

No, the main problem with this is theological. That Turkish delight isn't all that great is sort of the whole point of Edmund's betrayal. He is willing to sell out his family for a few pieces of candy, and not even an especially great candy. Consider Romans 6:20-21. Edmund's betrayal earns him nothing, except to make him a slave to the White Witch, who soon begins driving him with a whip.

Our own sins are similar, as we willingly turn aside from One Who loves us for the trifling glamours of evil. Christ has already made the sacrifice to redeem us from slavery to sin, and we need only choose to accept it. All temptation amounts to nothing more than Turkish delight, and ends in nothing more than slavery.