Book IX · Chapter 23

As thou thyself art a component part of a social system, so let every act of thine be a component part of social life. Whatever act of thine then has no reference either immediately or remotely to a social end, this tears asunder thy life, and does not allow it to be one, and it is of the nature of a mutiny, just as when in a popular assembly a man acting by himself stands apart from the general agreement.