How we cite our quotes:
"Oh, by the way, you do realise you've got a tail, don't you?" […]
"I must say that never occurred to me," I said. "Good gracious me, so I have! I can see it now! I can actually move it! It is rather grand, isn't it?" (18.16)
How funny that our narrator-mouse doesn't even realize he has a tail until his grandma mentions it. One more piece of proof that he doesn't necessarily feel different – he knows he can run fast, but, unless he looks in a mirror, he doesn't really know how different he looks. His transformation was only physical – nothing about his feelings or personality changed.
I watched him with envy. For weeks I had been trying to whistle like that but I hadn't succeeded once. Now I never would. (20.26)
This is one of the few times that our narrator seems a little disappointed about his transformation. It's not because he can't do big things, like go to school or ride a bike. It's because he can't whistle. It's the little things that bother us the most sometimes.
It was lovely to be back in Norway once again in my grandmother's fine old house. But now that I was so small, everything looked different and it took me quite a while to find my way around. (21.1)
Physical transformation leads to a change in perspective. Think about it this way. If you give a camera to a three-year-old and ask them to take pictures, you're going to get way different pictures than you would if you gave the camera to an adult. Kids and adults physically just can't see the same things. Now, imagine giving that camera to a mouse. Well, you get the point.