One worldbuilding thing that's always fun to do is take something you've encountered in the real world, and apply something similar with the same logic into your own. Like those sayings that have two halves, but people usually only know the first half and misunderstand the saying - like "birds of a feather flock together (until the cat comes)" or "great minds think alike (but fools rarely differ)." So I came up with a few for The Book I'm Not Writing:
Hungry dogs are loyal dogs (until someone else feeds them) - neglecting and mistreating your underlings may work as a short-term tactic for making them obey, but it's also a guarantees that they'll betray you at first chance.
The mouth of an idiot is as loose as the strings of their purse (so be there when gold may drop out) - just because nine out of ten things that someone says are completely useless doesn't mean you should dismiss them altogether. They might still know useful things, even if they can't tell it's useful.
Blood makes a foul dye (it stains, but it won't last) - here "foul" is often interpreted as "brutal" or "gruesome", when it's meant as "of low quality". Using violence as your way to establish dominance and maintain authority because it's easier than building networks of mutual trust and respect is as stupid and short-sighted as using blood to dye clothes because it's cheaper than proper pigment.
A fool will starve to death while waiting for grain to grow (but it is also a fool who'll slaughter an ewe an hour before it lambs) - Immediate problems require immediate solutions, but you'd better make sure that your drastic emergency solution is the right one.
A blind horse will go as you guide where a half-blind one dare not (both through the darkness and down a cliff) - an agent who doesn't know the purpose of their task will obey blindly, where one that knows some part of it might disobey out of distrust, but neither is as reliable as one that does see the big picture, can draw their own conclusions from the information they gather, and adjust their plans accordingly.