英语翻译

英语翻译
Do you know that every person wears two bags?One in the front is small,the other on the back is very big.
People know all about the bags that are worn in the front,but very little about the back bag.Peter,for example,often takes a quick look at the bag he wears in front,and he sees that it has all the mistakes of other people.He feels that he is the greatest and the best because he thinks there is nothing wrong with him.
The other bag is worn on his back so he can’t look into it.He doesn’t know he himself has all these mistakes.The back bag is not even big enough to put all his mistakes in.It’s a pity that people can’t sometimes change the places of the two bags,otherwise（否则）they could find out how big their own mistakes are.