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If milk spoils, it becomes yogurt. Yogurt is more valuable than milk. If it spoils further, it turns into cheese. Cheese is more valuable than yogurt and milk.
And if grape juice becomes sour, it turns into wine, which is even more expensive than grape juice.
You are not bad because you made mistakes. Mistakes are experiences that help you become more valuable as a human being.
Columbus made a navigational error, leading to the discovery of America.
Similarly, according to research, good students will make more mistakes than average students because those mistakes make them better.
Sitting and thinking does not make us perfect. Start working, stumble, make mistakes and learn lessons that help us become more perfect.