Dangerous Irritability.—Talented men who are at the same time idle will always appear somewhat irritated when one of their friends has accomplished a thorough piece of work. Their jealousy is awakened, they are ashamed of their own laziness, or rather, they fear that their active friend will now despise them even more than before. In such a mood they criticise the new achievement, and, to the utter astonishment of the author, their criticism becomes a revenge.