It is difficult to select just three quotations to illustrate how the animals idealistic views of freedom lead to a corrupt totalitarian state, modelled in some part on Orwell’s observations of Russia. The whole novel is an allegory of human behaviour in the face of power. In order to illustrate how insidious the corruption is, and how the pigs manipulate the truth for their own ends, I would begin with the seventh commandment of Animalism from chapter 2-
All animals are equal.
This is amended by chapter 10 to-
All animals are equal, but some are more equal than others.
The wearing away of the original tenets of their new society show the pigs in particular as corrupt and cruel manipulators. The commandments are amended beyond their original meanings and their history denied then changed.
The animals’ plan was to overthrow their harsh lives as subjects of the farmer and humans in general. Their ideals are totally destroyed by the end of the novel, when there becomes no distinction between the pigs and their original oppressors-
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.