On things changing

Mr. Jeavons asked me whether this made me feel safe, having things always in a nice order, and I said it did.
Then he asked if I didn't like things changing. And I said I wouldn't mind things changing if I became an astronaut, for example, which is one of the biggest changes you can imagine, apart from becoming a girl or dying.
He asked whether I wanted to become an astronaut and I said I did.
He said that it was very difficult to become an astronaut. I said that I knew. You had to become an officer in the airforce and you had to take lots of orders and be prepared to kill other human beings, and I couldn't take orders. Also I didn't have 20/20 vision, which you needed to be a pilot. But I said that you could still want something that is very unlikely to happen.
Mark Haddon: The curious incident of the dog in the night-time