"The principle of utility is capable of receiving proof, only by showing that the only things desirable as ends are happiness and freedom from pain."

"War is an ugly thing, but not the ugliest of things."

"The only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others. His own good, either physical or moral, is not a …"

"Absoluteness of power is the most seductive of all illusions."

"The only security against total error is discussion."