根据以下资料回答第39、40题。
 When you make a mistake, big or small, cherish it like it's the most precious thing in theworld, because in some ways, it is. 
Most of us feel bad when we make mistakes, beat ourselves up about it, feel like failures, getmad at ourselves. 
And that's only natural: Most of us have been taught from a young age that mistakes are bad,that we should try to avoid mistakes. We've been scolded when we make mistakes at home, schooland work. Maybe not always, but probably enough times to make feeling bad about mistakes anunconscious reaction. 
Yet without mistakes, we could not learn or grow. If you think about it that way, mistakesshould be cherished and celebrated for being one of the most amazing things in the world: theymake learning possible; they make growth and improvement possible. 
By trial and error——trying things, making mistakes, and 16arning from those mistakes--wehave figured out how to make electric light, to paint the ceiling of the Sistine Chapel, to fly. 
Mistakes make walking possible for the smallest toddler, make speech possible, make worksof genius possible. 
Think about how we learn: We don't just consume information about something and instantlyknow it or know how to do it. You don't just read about painting, or writing, or computerprogramming, or baking, or playing the piano, and know how to do them right away. Instead, youget information about something, from reading or from another person or from observing usually,then you construct a model in your mind, then you test it out by trying it in the real world, then youmake mistakes, then you revise the model based on the results of your real-world experimentationand repeat, making mistakes, learning from those mistakes, until you've pretty much learned howto do something. That's how we learn as babies and toddlers, and how we learn as adults. Mistakesare how we learn to do something new, because if you succeed in something, it's probablysomething you have already known how to do. You haven't really grown much from that success--at most it's the last step on your journey, not the whole journey. Most of the journey was made upof mistakes, if it's a good journey.
 So if you value learning, if you value growing and improving, then you should value mistakes.They are amazing things that make a world of brilliance possible.
Why do most of us feel bad about making mistakes?