If you keep both cats and fish at the same time, and the cat eats the fish, besides blaming the cat, you should also blame yourself. Similarly, when you clearly know that human nature has weaknesses but do not take precautions, when you suffer a loss, besides resenting that person, you should also reflect on yourself. Everyone is human, with both good and evil aspects of human nature. We should never forget that just because someone appears kind, they also have weaknesses in human nature.