Sincere and unspiteful laughter is mirth, but where is there any mirth in our time, and do people know how to be mirthful?... A man's mirth is a feature that gives away the whole man, from head to foot. Someone's character won't be cracked for a long time then the man bursts out laughing somehow quite sincerely, and his whole character suddenly opens up as if on the flat of your hand.