“In our present society, for instance, an exploited wage worker, who catches a glimpse of what work and life might and ought to be, finds the toilsome routine and the squalor of his existence almost intolerable; and even when he has the resolution and courage to continue steadily working his best, and waiting until new ideas have so permeated society as to pave the way for better times, the mere fact that he has such ideas and tries to spread them, brings him into difficulties with his employers.”