Three favourite quotes from The Animal Farm (George Orwell)

Attention: spoiler.
If you have not read The Animal Farm but intend to in the future (or even if you don’t) here are my three favourite quotes from the book.
Quote 1
THE SEVEN COMMANDMENTS
- Whatever goes upon two legs is an enemy.
- Whatever goes upon four legs, or has wings, is a friend.
- No animal shall wear clothes.
- No animal shall sleep in a bed.
- No animal shall drink alcohol.
- No animal shall kill any other animal.
- All animals are equal.
Quote 2
For once Benjamin consented to break his rule, and he read out to her what was written on the wall. There was nothing there now except a single Commandment. It ran: ALL ANIMALS ARE EQUAL BUT SOME ANIMALS ARE MORE EQUAL THAN OTHERS
Quote 3
The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which.