Sayings

Give a man a fish and he eats for a day. Teach a man to fish and he starves to death unless he just happens to master the skill in a day and also lives close enough to a pond that has fish in it, unless you give him a fish anyway.

"An eye for an eye makes the whole world go blind" makes the whole world go blind while a few people go poking out eyes with impunity.

Opinions are like assholes: people often don't want to hear about yours, but if you refuse to ever use it, you'll get sepsis and die.