Dr. Seuss, in his humorous way, encourages a young boy not to grumble and complain about his circumstances as there are always people and situations who are worse off than he. "It's a troublesome world. All the people who're in it are troubled with troubles almost every minute. You ought to be thankful, a whole heaping lot, for the places and people you're lucky you're not!"
The thinks you can think when you sit back and listen with eyes shut and hopping and all sorts of fishin'. Oh say can you say there's a fox in some socks with green eggs and ham and of course Mr. Knox.