“ A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. ”
Source: Mostly Harmless
Similar Quotes
The biggest mistake that people make is they try to be happier than someone else. 
There are no good people and bad people. Everyone is oscillating between the two. But for sure there are the Intelligent and the Idiotic. 
The idea that I can't share my problems with other people makes me not give a shit about their problems. 
Only miserable people will have a long life, because if you are miserable you will always feel life is too long that you will want to cut it short. 