Why does the fox say grapes are sour? Tell me why.

The reason why foxes say grapes are sour is because when they feel depressed because their real needs are not met, in order to alleviate their inner anxiety, they will make up some "reasons" to comfort themselves, thus eliminating tension, relieving stress, freeing themselves from negative psychological states such as dissatisfaction and anxiety, and protecting themselves from harm.

The story in Aesop's fable "sour grapes" is well known: the fox wants to eat grapes, but because the grapes are too high to eat, they say that the grapes are sour and there is nothing delicious. In psychology, taking this as an example, individuals often belittle their goals and say that they are not worth pursuing in order to dilute their inner anxiety, which is called the "sour grapes" mechanism or the "sour grapes" effect.

On the contrary, some people can't eat grapes, only lemons, so they say lemons are sweet. This psychological phenomenon is called the "sweet lemon" mechanism. It doesn't mean that the goals you can't reach or the things you can't get are bad, but it emphasizes that all the lower goals you have are good, so as to alleviate your inner loss and pain.