Once a primary school teacher set an assignment to a group of students. She asked them to write down what they wanted to be when they grow up.

Someone wrote astronaut. Someone wrote actor. Someone wrote model. Someone wrote author. Someone wrote engineer. Someone wrote scientist.

When the teacher was marking through the paper of the students, she noticed one of the boys wrote down the word "happy."

She went up to him and said, "John, maybe you misunderstood my assignment."

The boy said, "No, miss. I think you misunderstood life."

Later, the boy became the leader of The Beatles, the greatest band ever existed.