跪求英语原文，是约翰列侬的一句话。在下面问题补充中

When I was 5 years old, my mom always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down “happy.” They told me I didn’t understand the assignment and I told them they didn’t understand life.

At the age of five, my mother told me, life is the key to happiness. After school, they asked me to do something, I write " happy ". They said, I understand the wrong topic, I say, they understand the wrong life. -- John Lennon.