Swami Vivekananda— You are confusing one thing with the other. Karma means either service to humanity or preaching. To real preaching, no doubt, none has the right except the Siddha Purusha, i.e. one who has realised the Truth. But to service every one has the right, and not only so, but every one is under obligation to serve others, so long as he is accepting service from others.