#ETH Why is it said that you should never test human nature?

1. When my son got admitted to Peking University, my mother didn't make a fuss or treat anyone. After graduation, my son earned a million yuan a year, but my mother claimed that she could barely make ends meet. My son spent 8000 yuan to buy a down jacket for my mother, but when asked by others, she said it only cost 200 yuan.
The son was a little puzzled, so he asked his mother, 'Mom, why are you so low-key?' The mother said, 'Do you know that Aunt Zhang upstairs is the mother-in-law of a big shot? She never mentions it. In this world, only parents hope that you will live well.'
2. Previously, A liked to tell the truth and hurt many people. This time, A is in Chongqing and bought a large flat, but didn't post it on Moments. A matured overnight. In 2012, A got drunk in the village and said he made 10 million in a year, just a small amount. Half a year later, all the fish in A's fish pond were poisoned by someone. In places without street lights, there are only livestock wandering at night.
3. Do not share your joy of success with others, nor share things that make you happy. Always remember, the greatest evil in human nature is the inability to see others doing better than oneself, especially those who were once inferior.
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