What does this idiom mean?

We often use the phrase "a blessing in disguise is a blessing in disguise" to comfort others, so the meaning of a blessing in disguise is mainly to tell you that although you lose money or fail for some reason, it is not necessarily a bad thing. Everything has two sides, both good and bad. We should be optimistic about everything.

The phrase "A blessing in disguise is a blessing in disguise" comes from the story of "A blessing in disguise is a blessing in disguise", and it comes from "Huainanzi purgatory on earth". This article is about an old man's horse running outside the Great Wall in ancient Saibei. Neighbors around him are afraid of his sadness and comfort him. The old man is optimistic, but he thinks this is not necessarily a bad thing. A few days later, the old man's horse not only came back, but also brought back a batch of good horses from the Hu people. The neighbors came to congratulate him again, but the old man thought that this was not necessarily a good thing.

Later, my son accidentally broke his leg while riding a bike. Everyone came to comfort the old man, but he thought it was not necessarily a bad thing. Later, because of the war, the old man's son escaped the war because of his inconvenient legs and feet, and saved his life. Therefore, the phrase "a blessing in disguise is a blessing in disguise" has been passed down through the ages.

This sentence tells us that nothing can be judged by temporary gains and losses. A bad thing is not necessarily a bad thing, but it may become a good thing. In this life, no matter whether it is a disaster or a blessing, we should adjust our mentality, be optimistic and look at the gains and losses of anything with a dialectical attitude.