Here's how the story illustrates this:
* Jack's laziness leads to hardship: Jack repeatedly refuses to work, relying on others to do his tasks for him. This laziness leads to him facing increasingly difficult situations, culminating in his having to walk to a faraway land to find his fortune.
* The rewards of hard work: Throughout his journey, Jack's encounters force him to overcome challenges and work hard. The more he works, the more he gains, ultimately ending up with a wife, a cow, a house, and wealth.
* The importance of self-reliance: By the end of the story, Jack has learned the value of hard work and self-reliance. He no longer relies on others and has gained everything he needs through his own efforts.
This story teaches children (and adults) that while shortcuts might seem appealing, true success and fulfillment come from putting in the effort and overcoming obstacles.