Any wizard bright enough to survive for five minutes was also bright enough to realize that if there was any power in demonology, then it lay with the demons. Using it for your own purposes would be like trying to beat mice to death with a rattlesnake.
Interpretation
Power drawn from dangerous sources can lead to self-destruction.
In this quote, Terry Pratchett reflects on the folly of attempting to control or utilize dark powers for personal gain. He likens the effort to a dangerous and ultimately futile struggle, highlighting that those who understand the true nature of such powers recognize their inherent risks and the potential for self-harm when meddling with them.
In practice
In a lecture on ethics in magic, one might quote this to emphasize the risks of using dark powers.
And then Jack chopped down what was the world's last beanstalk, adding murder and ecological terrorism to the theft, enticement, and trespass charges already mentioned, and all the giant's children didn't have a daddy anymore. But he got away with it and lived happily ever after, without so much as a guilty twinge about what he had done...which proves that you can be excused for just about anything if you are a hero, because no one asks inconvenient questions.
They've got something they do it with, I think it's called a mocracy, and it means everyone in the whole country can say who the new Tyrant is. One man ... one vet. ... Everyone has ... the vet. Except for women, of course. And children. And criminals. And slaves. And stupid people. And people of foreign extraction. And people disapproved of for, er, various reasons. And lots of other people. But everyone apart from them. It's a very enlightened civilization.
Geography is just physics slowed down, with a couple of trees stuck in it.
You can't trample infidels when you're a tortoise. I mean, all you could do is give them a meaningful look.
Any fool could be a witch with a runic knife, but it took skill to be one with an apple corer.
People look down on stuff like geography and meteorology, and not only because they're standing on one and being soaked by the other. They don't look quite like real science. But geography is only physics slowed down and with a few trees stuck on it, and meteorology is full of excitingly fashionable chaos and complexity. And summer isn't a time. It's a place as well. Summer is a moving creature and likes to go south for the winter.
If you limit your actions in life to things that nobody can possibly find fault with, you will not do much!
Thyself shall see the act; For, as thou urgest justice, be assured Thou shalt have justice, more than thou desir'st.
Good character is not formed in a week or a month. It is created little by little, day by day. Protracted and patient effort is needed to develop good character.
Vice is perhaps a desire to learn everything.
Unlucky people miss chance opportunities because they are too focused on looking for something else. They go to parties intent on finding their perfect partner and so miss opportunities to make good friends. They look through newspapers determined to find certain types of job advertisements and as a result miss other types of jobs. Lucky people are more relaxed and open, and therefore see what is there rather than just what they are looking for.
You can indulge your righteous rage but the things it comes out of are pretty cheap. The trick is to make yourself an instrument of your own policy. Whether you like it or not, that's the highest effectiveness man has achieved.
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