“Most of the evil in this world is done by people with good intentions.” 
― T.S. Eliot

“And good intentions? These scared him the most: people with good intentions tended not to question themselves. And people who didn't question themselves, in the scientific world and beyond, were the ones to watch out for.” 
― Shanthi Sekaran, Lucky Boy

"No good deed ever goes unpunished"
- Oscar Wilde