One of my favorite comparisons is computing to magic. They say that sufficiently advanced technology is indistinguishable from magic.

A lot of people have a hard time drawing that comparison, but if you tell them that there are very special, rare ~~silica~~ rocks that you can only find in specific places on earth, and that if you inscribe one of these rocks with billions of tiny ~~transistors~~ runes and then ~~power~~ infuse the rock with ~~electricity~~ lightning you can actually ~~make~~ trick the rock into ~~a processor~~ thinking, and that this now let's you create ~~software~~ incantations which explain to the ~~processor~~ thinking rock how to ~~execute a program~~ do specific things for you, then they begin to see why.