'No animal in England knows the meaning of happiness or leisure after he is a year old. No animal in England is free. The life of an animal is misery and slavery: that is the plain t ruth.'
p. 2
Old Major's dream at the beginning of the book marks the start of the Revolution, but it's words are eventually twisted to the benefits of the pigs. For a while, Snowball is able to establish a community that accomplishes Major's goals: one where animals do "know the meaning of happiness and leisure". In the end, the animals feel the same pain that major describes in this quote. Napoleon, in fact, plans for the animals to go back to the ways of Manor farm that Major describes in this quote.
NO QUESTION, NOW, WHAT HAD HAPPENED TO THE FACES OF THE PIGS. 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.
P. 54
While the pigs are having a feast with Frederick and Pilkington, they have grown so fat that the animals cannot discern the two species. This not only a representation of the physical changes in the pigs (they also began walking on two legs), but also Napoleon's change in policy. Originally, the animals follow the saying of "four legs good, two legs bad", which meant that the animals were in a never-ending war against the humans. However, Napoleon ends up taking the role of Jones himself, and has no plans of living out the spirit of the Revolution.
SOMEHOW IT SEEMED AS THOUGH THE FARM HAD GROWN RICHER WITHOUT MAKING THE ANIMALS THEMSELVES ANY RICHER — EXCEPT, OF COURSE, FOR THE PIGS AND THE DOGS. PERHAPS THIS WAS PARTLY BECAUSE THERE WERE SO MANY PIGS AND SO MANY DOGS.
P. 49