"The 'self-regarding' actions are those which primarily and directly affect only the agent himself."

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

"The only way in which a human being can make some approach to knowing the whole of a subject, is by hearing what can be said about it by persons of every variety of opinion, and studying all modes in …"

"Originality is the one thing which unoriginal minds cannot feel the use of."

"Every man who says frankly and without cant, what he thinks, will be in some way a benefactor to his age."