Quote by John Stuart Mill
"The person who fights with monsters should beware that in doing so he does not become a monster himself."
More from John Stuart Mill
"It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied."
"The only freedom which deserves the name is that of pursuing our own good in our own way."
"Actions are right in proportion as they tend to promote happiness, wrong as they tend to produce the reverse of happiness."
"The person who can be only an easy optimist is a coward."