This has always stuck with me. I’m not well enough read to know if he borrowed it from somewhere, but I’m not sure Terry Pratchett ever wrote finer words than those. Beautifully concise and apt summary of the human condition.
That's very naively materialist. Once you notice that, it becomes clear that the concepts mentioned are not "lies".
The passage may be trying to say something serious about those concepts not being universal, objective ones, but if it's intending to make a serious point it misses the mark.
But then again, it may not be intended to be taken seriously at all. Perhaps Pratchett assumed the weaknesses in this position would be obvious.
> Likewise, paper money
If someone writes an IOU to you, is that a lie? How about a check?
It creates false equivalences, blurs important distinctions, and doesn't help people understand the nature of these concepts - rather, it obscures that nature.
Also, stick with it through one book. I found quite a few books childish in the beginning. It is often a journey from "this is silly" over "ok, it has its own logic" to the realization "our reality is just as weird".
“All right," said Susan. "I'm not stupid. You're saying humans need... fantasies to make life bearable."
REALLY? AS IF IT WAS SOME KIND OF PINK PILL? NO. HUMANS NEED FANTASY TO BE HUMAN. TO BE THE PLACE WHERE THE FALLING ANGEL MEETS THE RISING APE.
"Tooth fairies? Hogfathers? Little—"
YES. AS PRACTICE. YOU HAVE TO START OUT LEARNING TO BELIEVE THE LITTLE LIES.
"So we can believe the big ones?"
YES. JUSTICE. MERCY. DUTY. THAT SORT OF THING.
"They're not the same at all!"
YOU THINK SO? THEN TAKE THE UNIVERSE AND GRIND IT DOWN TO THE FINEST POWDER AND SIEVE IT THROUGH THE FINEST SIEVE AND THEN SHOW ME ONE ATOM OF JUSTICE, ONE MOLECULE OF MERCY. AND YET—Death waved a hand. AND YET YOU ACT AS IF THERE IS SOME IDEAL ORDER IN THE WORLD, AS IF THERE IS SOME...SOME RIGHTNESS IN THE UNIVERSE BY WHICH IT MAY BE JUDGED.
"Yes, but people have got to believe that, or what's the point—"
MY POINT EXACTLY.”
― Terry Pratchett, Hogfather
Likewise, paper money: https://wiki.lspace.org/mediawiki/Paper_Money