"All that makes existence valuable to any one, depends on the enforcement of restraints upon the actions of other people."

"The love of money is the root of all evil: but the love of liberty is the root of all good."

"The despotism of custom is everywhere the standing hindrance to human advancement."

"To be prevented from doing what one is inclined to do, is bondage."

"We can never be sure that the opinion we are endeavouring to stifle is a false opinion; and if we were sure, stifling it would be an evil still."