這個問題與科學無關，親愛的你可以回答“我認為我全身上下的每個部位都是獨一無二的，都很重要”，這樣回答固然不錯。這篇文章給出的不是一個答案，而是內心的一份感動，一個能夠啟發你去思考的瞬間。

My mother used to ask me what the most important part of the body is. Through the years I would guess at what I thought was the correct answer.

When I was younger, I thought sound was very important to us as humans, so I said, "My ears, Mommy."

She said, "No. Many people are deaf. But you keep thinking about it and I will ask you again soon."

Several years passed before she asked me again. Since making my first attempt, I had contemplated the correct answer.

So this time I told her, "Mommy, sight is very important to everybody, so it must be our eyes."

She looked at me and told me, "You are learning fast, but the answer is not correct because there are many people who are blind."

Over the years, Mother asked me a couple more times and always her answer was, "No, but you are getting smarter every year, my child."

Then last year, my Grandpa died. Everybody was hurt. Everybody was crying. My Mom looked at me when it was our turn to say our final good-bye to Grandpa. She asked me, "Do you know the most important body part yet, my dear?"

I was shocked when she asked me this now. I always thought this was a game between her and me. She saw the confusion on my face and told me, "This question is very important. It shows that you have really lived your life." I saw her eyes well up with tears. She said, "My dear, the most important body part is your shoulder."

I asked, "Is it because it holds up your head?"

She replied, "No, it is because it can hold the head of a friend or loved one when they cry. Everybody needs a shoulder to cry on sometimes in life, my dear. I only hope that you have enough love and friends that you will have a shoulder to cry on when you need it."

Then and there I knew the most important body part is not a selfish one. It is sympathetic to the pain of others.

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（來源：恒星英語論壇 實習生：鄭超 編輯：Rosy）