What is the moral of the story the grapes are sour?

The moral of the story "The Grapes of Wrath" is that people often downplay what they cannot attain, rationalizing their failures to cope with disappointment. This reflects human nature's tendency to dismiss or belittle things that are out of reach, illustrating the concept of cognitive dissonance. Ultimately, it serves as a reminder to confront our desires and aspirations honestly rather than making excuses.