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.
A branch cut off from the adjacent branch must of necessity be cut off from the whole tree also. So too a man when he is separated from another man has fallen off from the whole social community. Now as to a branch, another cuts it off, but a man by his own act separates himself from his neighbour when he hates him and turns away from him, and he does not know that he has at the same time cut himself off from the whole social system.